Actually I think most of us would like to see you make an effort to educate yourself like about 90% of us did. No one was around to spoon feed us even the most basic of things. As we moved forward in our building careers, we gravitated to a site like this when it became available to exchange information on more technical aspects of building a good representation of a traditional longrifle. Most of the experienced builders have amassed quite a library of books, videos and other instructional material. So buy some good building books, there are lists posted here, educate yourself and use your intelect to attempt to answer your questions first.
Your question ask if you put a inlay in before you carve the area. If you put a wrist inlay in after the relief carving is completed how do you file the inlay to completely conform with the surrounding area if it is already surrounded with a relief carving? Building longrifles is not rocket science, and half the fun is the journey Take a few steps down the journey on your own and enjoy the feeling that comes from solving a problem. If you get in over your head we are more than happy to bail you out, but make an effort first...I know this may sound harsh, but once you start building and feel confident with the process you will understand where it comes from, and I do not mean it as a personal attack.