Absolutely Rosemary!! Your set-up (a good running machine set down in a cabinet, at the right height, with lots of surface all around to support the weight of your project and a good chair with back support) is a HUGE factor in how well you can quilt, but the main thing that makes a good result is practice, Practice, PRACTICE!!!
I started machine quilting on 30 year old Singer sewing machine in 1992 and quilted on it for a couple of years before I burned up the motor on it!
I bought my first Bernina and quilted on it until I got my long-arm in 2008.
You have to realize that if you wait to "find" time to practice quilting, it probably won't happen. If you want to get good at it, you need to MAKE time to practice. Treat it like any important appointment, and write it on your calendar. If someone asks you to do something during the time you have scheduled for quilting, politely tell them that you already have a commitment. It's just a matter of commitment. Learn at every opportunity (have you watched all of the TQS shows and classroom videos?) and practice new techniques that interest you.