Just as a request to keep people safe what you should do is a have some popups for people to use metamask on the site instead of exposing their private keys to you. This is, without a doubt, going to help in making people feel more secure on this site (even if your main goal isn't to get customers, it's just to have a little hobby on the side)
I must say this is pretty cool though, may I ask what code you're proficient in? I may have some work that I may need done, unrelated to Bitcoin completely but I am looking for some coders.
I'm learning coding as a hobby right now, Im learning how to build automatic bots in Python. What do you need done? I'm specialize in trading, data analysis and i do market advising for ICOs. I know a lot of developers that are more capable I don't mind connecting you with. I can build websites, especially Wordpress since it's easy.
Wordpress has plugins for crypto stuff too, I was contracted for a few builds and they seem happy with it. I accept major coins, tokens, free lifetime services, plaster my name on your site, free puppies... lol Like I said, its a hobby Im learning. I'm not greedy, if all you need is advises i can just give you for free.
