Doing competent gun work comes down to a person's skill level with tools. There are various levels of mechanically inclined individuals. There are a number of basics, a person should be unflinchingly comfortable with. Reading a Dial caliper and being able to file a true flat onto a surface. Are you prepared to buy a varied number of tools. The sad thing is a lot of folks "think" their basic maintenance auto mechanic skills will carry them threw. And for some it may, but others just end up with a zip lok baggy being dropped of at a Gunsmith shop. So a day or week end may only tell you if you maybe, kinda, sorta have the skill talent to shape, fit and form gun steel. Best thing is buy your self some clunkers and see if you can install non fitting sights, make new grip panels "better" that the originals, learn trigger sear function and the geometery in the various designs. Having the ability to understand the function of each interrelated gun part is a key mechanical ability that not many folks have. Where you fall into those abilities will show up in your clunker reworks!