If'n it were me, and I wanted to custom build one, the first thing I would do is get a kit from someone like CVA. Or maybe you already did that but are more interested in carving a custom stock?
It would also help if you told folks about your level of experience. Asking others to "mentor" someone who has no experience at all is a lot to ask anyone. If you have a good working relationship with your machine, understand the techniques of fixturing multiple sided jobs, etc then what you could do is get started and then ask specific questions.
Your posts are not very specific.
Here is the deal. Some of us have been doing this for a very long time, we have machining backgrounds, understand standard shop techniques. Trying to convey that information to someone with little to no experience becomes quite tedious. Sure, we have no problem helping beginners, but they need to understand they have to apply a lot of effort on their own.
It is an intriguing project, that is for sure. Quite a few years ago I built a .50 cal from CVA, turned out pretty nice. I never drilled the touch hole (at the time, if I did that in the state I lived in, I would have been wading through paperwork for months on end) so it is just a display piece not capable of firing.
Oh, one thing that helps is if you include your location. Yea, it is the internet and we have all heard the paranoid rants, but no one here has disappeared mysteriously in the ten years I have been participating. You never know, someone who is nearby may see your post and be willing to help out.
"If you see a good fight, get in it." Dr. Vernon Jones