Internals...

I've decided my external days are over, and I'm looking for recommendations as to where I should start with coding internals. I've already searched the forums for projects and source code that I could use as a reference (paste from), so I'm not asking for that, I'm asking for what I should make (paste) first. My end goal in mind is something with mainly legit bot purposes, of course visual aspects and more than likely smaller, misc things such as bunnyhop and a bomb timer. With that being said, I have none of my own code written (and never will, #paste), and as I said previously, I'm looking for what I should start with, be it triggerbot, esp, etc. Also, what would you recommend gui wise, ImGUI, Paintraverse, etc? I have a design for a menu planned out already, I'm just not sure what I should use for it. All in all, thank you in advance, unless you're about to or already have written a sarcastic, scummy reply.