Best starter resources

I am just getting into software development, currently focusing on the different models etc (waterfall, V-Model, their variations, Scrum, Kanban…).

I am having a little bit of trouble of identifying what exactly they are, I feel like I see a lot of sources sprinkling different info around and and lots of it even feels like advertising more than educational material (or it feels almost like it is not even coming from an IT perspective). I can say a few sentences about each of these topics but I want to get a deeper understanding and clear some of my basic questions.

I would really appreciate your favorite (beginner friendly) sources!