I second tinkercad for super basic parts. Need to print a knob for a radio that isn’t on thing-verse? 20min in tinkercad.
For blender basic things to learn could be plugging a hole in a part and adding a smaller or bigger one to match the screws you have on hand.
Or cutting a part in half to extend it, fill in the gap.
100% this. I see tariffs on foreign cars coming quick.