The only Git GUIs that I've ever liked:
- GitX, and its many forks. Mac only though.
- Git Extensions. Terrible name, but this is actually a standalone Git GUI and is surprisingly decent. I think it started Windows only but maybe there's a Linux port now.
- VSCode's "Git Graph" extension. It's not quite as fully featured but it integrates well into VSCode and is pretty nicely designed.
I've tried almost all the others (SmartGit, Sublime Merge, GitKraken, etc.), and didn't really like how they worked.
I would probably recommend not trying to understand the whole field of programming initially. It's huge, you won't understand what the terms mean (e.g. OOP, functional programming, etc.) and it's not very motivational.
Instead I would pick one or two popular languages to learn and actually make something in. The no-brainers are Python and Typescript. They're hugely popular, not difficult, and let you get a lot done.
I think I would consider learning both at the same time. If not, at least don't stick with Python too long. It is immensely popular but also has a lot of brain dead design decisions. Especially a) it's reaaaally slow, you easily get a 50x speed up just by switching language, and b) the "infrastructure" around it - installing Python, adding libraries etc. is completely awful. There are attempts to fix that but they're nascent.
Above all I think a good thing to have is a realistic goal of something to make. For Typescript the obvious thing is a web site. I really like this way of making web sites - you can get started with literally 2 command - but it may be a little too much for a beginner.
For Python I would look into some kind of automation or maybe web scraping thing. It's decent at that.
Or if you have more specific project ideas you could use the most appropriate language for those, e.g. a microcontroller project you probably want to start with Arduino (C++). C++ was my first language (apart from QBasic which doesn't count). Probably not for everyone though. I was very young and had free time.