I have over a hundred chisels from years of wood carving and stock work. Funny thing is that I use maybe eight of them for 99% of my stock inlettning. Oh a few might come in handy in some odd situations but a basic group does almost everything. More than a large number of tools is being able to sharpen them to a razors edge and touching them up quickly while in use. Nothing cuts as well as a sharp edge or can ruin a job faster than working with dull tools and forcing harder to cut things because they are dull, then loosing control and screwing things up. Been there a done that.
A good vise, good light, magnification, comfortable seat if working sitting down, inleting black or soot and time to work without distractions of fatigue. I've screwed up stocks working too long, after I should have called it a day or night. Sometimes you are trying to bring three or four things together at the same times and don't want to stop. Sometimes you set a point you must finish before stopping. That's always a mistake for me. Work when you are fresh, keep your mind on the job or just put it down and do it anther day.
If you are smart you'll write down notes as you go. Problems encountered and methods used or missed to get around them. No matter how hard you try you will miss things the first time that you could do better if you did the job again. Notes help you do it easier and better. I have bought several project guns, in the exact same model, so that I can use the worse condition ones to learn with and save the best one for the final exam. Same for blanks, use plain ones to learn with and better one for the final.