Gtk4-tutorial VS mseide-msegui

What's going on? I googled some more and found out from here that I have to use G_APPLICATION_FLAGS_NONE because ubuntu uses an older version of Glib-2.0 and im getting even more confused, if im trying to learn gtk how do i know in advance what i should even learn and what isn't going to work on my machine?

try https://github.com/ToshioCP/Gtk4-tutorial/

The problem is, how do you setup a top-level window "edit" menu that contextually supports these actions for whatever widget is focused. I honestly can't find any example. See this for example: https://github.com/ToshioCP/Gtk4-tutorial/blob/20b4a16175ae3f510151702c8a377b63547b13d8/src/menu3/menu3.c

have you tried this? https://github.com/ToshioCP/Gtk4-tutorial also https://github.com/frang75/nappgui is very interesting and promising.

I've been getting into GTK using ToshioCP's gtk4 tutorial but one thing that bothers me is the different looks on Windows. I've found some themes that could fix it, but I haven't figured out how I could embed my own theme + icons (.css file & subfolders with .SVG icons) into the application.

But after trying to follow along with the official documentation for glib I realized it's all a bit to complicated for me, and I'm really struggling to follow along with it (f*ck you ADHD). I then found a different tutorial that seems to be a bit more handholding and easier to follow along with, but my issue with that is that it doesn't cover glib and gobject, instead it just requires me to copy the code without understanding whenever any gobject related topics appear. I then found a book that fits my needs perfectly, but that is incomplete and as the book itself states it is far from finished, and from what I understand the creator gave up on it in 2019.

https://github.com/mse-org/mseide-msegui

Although a separate windowing set than Lazarus, both are enabled by the FreePascal compiler.

Lazarus does have a GTK backend as an option on Linux.