How can I invest in a small level startup with 2L-5L investment?

Got to know from someone that ppl invest amount in this range & get return on sales basis instead of the equity.

Is there any way in which I can invest in an early stage promising startup? Think of it as a medium term investment

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 ...