this is not a programming question per se just yet. I am embarking on my first ever real programming project. My uncle wants me to build my own (or find a way to incorporate many things) crm for his business since he does not like any of the ones on the market. Anyways I was wondering if someone could point me in the right direction?

-language (I am proficient in java, c, c++, and python)
-website to look at (tutorial)
-starting off tips