Great colors on your nine-patch, Mathew and welcome to the Forum!
I purchased my first sewing machine almost four years ago when I decided I wanted to learn how to quilt. I can say I worried as much about messing up the quilt and the machine as I did about cutting fabric and getting it wrong! It turns out that none of that matters because as you practice and make mistakes on the smaller project you should be trying (a runner instead of a bed quilt, for example), you'll find that you get better and better. As you get better at piecing, you won't be messing up as much and you'll also find that even if you mess up something, you can always take your trusty seam ripper and unpick the stitches and redo.
But to address your concerns, let me take them one at a time:
MESSING UP THE QUILT:
1. If you mess up something on the quilt, redo it. If ripping out the stitches too many times causes the fabric to stretch too much, you can always cut another piece of fabric and redo the block. My rule of thumb at the beginning was that if I had to rip a seam out three times, I would just cut fabric for a brand new block and try again.
2. When I wanted to try piecing something I had never done before, I would take scrap fabric or cheap fabric from the 50 percent off bin at Joann Fabrics and make a smaller version of what I wanted to make to practice making the blocks before doing the actual quilt I wanted to make. Here is my first quilt:
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It was
insane of me to want to tackle this as a first quilt, but I made table runners out of cheap fabric using those blocks until I got comfortable enough that I could do the larger quilt. The runner fabric was so ugly that I did not feel bad wasting it. After all was said and done, I LOVED the runner (including the fabric combination) I made and still use it as a "table mat for two" to this day. Four years later, the quilting on that first trial project looks better than I thought back then! Here's the runner:
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3. So I guess my point is, just be fearless and have fun. Some of the worries now, ten years from now you won't even remember, so let go and enjoy the process of learning. Some of our best learning comes from making mistakes. Some of the best innovative things we create come from mistakes, so let that be part of the journey.
MESSING UP THE SEWING MACHINE:
There is probably not much you can do to permanently ruin a sewing machine. My first machine (and only machine) was a top-of-the-line Bernina 830. I thought there was plenty I could do to ruin the machine, especially since I'd never sewn, let alone done it on a "sewing computer" with lots of bells and whistles.
1. Whether a simple machine or a complex one, take the time to read the manual and learn your machine's capabilities are and how to operate it. If you have a problem with something, stop, check the manual.
2. Look online and see whether the website for the brand of machine you have provides tutorials or projects that help you learn the capabilities of your machine. Make one of those projects to learn your machine. It's all about practice.
3. Keep your machine in good working order. At the end of the day, when I'm finished sewing, I take a few minutes to clean my machine so that when I turn on the next day it's ready to go and also never gets so dirty that it interferes with stitch quality.
4. Learn that there is a relationship among thread, needle and tension (I call it TNT). Learn the different needles available and what they are best suited for, the size of the opening of the needle and how that relates to the size thread you use. Practice getting good tension with your seam. Your manual probably has all that. Go to a nearby sewing machine dealer and ask one of their specialists to help you better understand that, if you need it (you can probably find some good online YouTube tutorials on this).
5. Take a class on how to operate your machine. Make sure you read the manual before you go and be prepared to ask questions.
6. If you really think you've messed up badly and don't know what to do, call someone (perhaps your technician or dealer or post on the Forum here). Never feel that you can't ask for help. We learn so much from others!
These are the things I remember most from when I started not so long ago. I am doing things today that I never thought I could do but it's all been part of a journey I chose to embark on because it was something I really wanted to be doing and enjoyed. I thought about quitting a couple of times, but just took time-out and came back to it when I was ready to try again. And I feel pretty fearless nowadays because the seam ripper has become my best friend and I can always cut another piece of fabric. You're going to get a lot of great advice from lots of folks on this forum--try things you learn and see what works for you and what doesn't. There is no one way of doing things in this hobby, there are many paths. Hope this helps and look forward to hearing about your adventures with quilting.
PS Think about joining a local guild--lots of seasoned quilters who would love to teach you the ropes!