Gimp and PS made no sense to me. Ive learnt $d modling over time and don't it fairly easy.
Started with Tinkercad. Its fine for the basics. Square plus circle minis triangle etc. It dosnt have a timeline or parametric though, so small changes are pretty hard.
Mixed to fusion360. Free if you can navigate the site. Heaps of tutorials non lone and really solid to. Basically draw in 2d and extend. Draw in 2d and cut. Heaps non other use full ways to modify things too. Its parametric so you can say one side is X long. And change X and the model will scale.
Focus on the 2d shapes, fully constraining them and making them simple.
Moved to Onshape. Its not got the 10active models that fusion has. And runs (surprisingly well) in browser. i can jump on any PC (work cough) and make edits. The tools (for most people) are on par with fusion and I found it more initiative.
Watch heaps of builds on fusion and you'll get the just pretty quickly.
Cold brew French press running mint, checks out.