My major suggestion is to start with something small. Making a potholder or table runner has all sorts of learning opportunities in it.
It's even okay to have "practice pieces" that are kind of duds.
Think of all the homework that we did in school - not much of mine was perfect.
Think of the plaster/popsicle stick/whatever things we made in school as little kids - some of them - bless their little makers' hearts - did look pretty good. Some of them were precious because "mama's little one" made it.
Is there any sport where people expect one to be "perfect" 100% of the time.
It's okay to "learn as you go." In fact, there is no other way to learn that I know of.