This is a subject where I really wish I had a good experienced friend/mentor to take me by the hand and teach me it. I have an engineering degree (10 years ago

This is a subject where I really wish I had a good experienced friend/mentor to take me by the hand and teach me it. I have an engineering degree (10 years ago) but I honestly don't have a clue of how this shit works, other than some basic physics intuition.