Never,never give up. Make some small quilts, potholder size and practice, practice,practice. Experiment until you find something that suits you. When I first started I use to quilt 1/4" from the seam line. If your machine does fancy stitches, try using some of them. Can you truly imagine your life without quilting? Never judge yourself against others. Some people are better and some maybe not as good. Only judge against your past work to see if you've improved.
WE are not all meant to be award winning quilters. I doubt I'd have the patience to spend 3-4 years on a quilt.
Please don't quit something you enjoy.
Happy quilting.