Creating anything physical requires a lot of practice, and practice really only works if you make mistakes and then learn from them.

Just have to accept that you will waste a lot of wood getting that practice. Heck, a lot of woodworking practice is repetition of the basics before trying to make something with those skills. Otherwise you end up with a bunch of hobbled together ugly stuff that still works like my stuff.

Not catching very slight warping in boards is my weakness.