Thanks. I don't have time to guide you through it all I'm afraid, but I'd suggest that using Python is probably the best language to start with. I am biased, but it is used used by beginners and experts. JavaScript is another good choice, but not so easy to understand IMO.

I use only Linux, so can't really explain how to set things up in other operating systems, but you'll probably need to download/install python and then install steem-python. After that, a search might help you further.

Good luck!