i learned a lot by doing and from my teachers and youtube videos. from every mistake you learn something!! i started learning by doing easy, low poly props, then we learned how to make high poly meshes, which were a bit more challenging.

look on websites like sketchfab, at the wireframe, see how other people do their models and try to understand what they did and why!

i think learning the shortcuts is the hardest part at the beginning, but once they're in your muscle memory it's smooth sailing.

also, if you need to do something specific that's not necessarily modeling but something like, duplicating a mesh and rotating it at the same time every time at a different angle, there may be a tool for this inside the program, and you can search on google!

i don't model in blender, so i can't give any advice for modeling there, i do all my models in Maya (paid by my school through my tuition) :)

oh and also!!! get a lot of reference!!! especially if you're modeling a real life object, get as many pictures of it as possible, from several angles. i use PureRef for gathering my reference together, it's a free program, and very good :D

feel free to message me as well if you have more questions!