Becoming a micro angel investor for investments?

Hello! As someone who works with startups (not in)and has a well paying job, I am often intrigued and keen to invest money (say a few lacs, and provide some mentorship) as a micro angel investor in early age pre series/ seed rounds, to try my hand. Not talking about becoming a LP or joining a VC/PE. (I know the pros and cos, the glamour and the ugly pieces) . While there are some fintech startups where you can invest as low as 5000/- in a startup, I believe these aren’t for me. Any guidance on how I begin and any learnings?

P.s have posted under finance section too. But thought might get some guidance here too!