My Living room, which is also my two channel room looked like a dog's breakfast (wife's words!). I had thought for some time I'd like to take on this project, but it took me a while to work up the nerve, figure out how to make the trim, shelving, cabinets, etc. I've done carpentry over the years, but I've not had to match existing cabinetry before.
I have some tools, but not a lot: compound mitre saw, circular saw, drill, sanders, etc. That was the other challenge, how to do this given my level of experience, and set of tools.
I was also a bit nervous as once I cut out the carpet there was no turning back, and that was the first step!
The last pic shows the unfinished cabinet (no back) in place for a test fit.