Becoming an angel investor?

What is the least amount of money that it would take to have a venture capital firm invest your money for you? Is it best to spread it out between a few firms to diversify? What percentage annual roi could I expect? What else would there be to know?

Risky is the name of the venture capital game. It is not for novices. You have to be prepared to lose everything you put up. Venture capital is a game for the rich and famous. You have to be savvy so that you don't get scammed. Return on investment may range from a loss of capital to unlimited amounts. $10,000 invested in Microsoft, 30 years ago might be worth $20 million today.
If you have so much money that you don't know what to do with it all, then consider venture capital.

if yo have small amonts to invest take a little time to check out these forums I've been doing this for two years now

I only do Proven Proformers here. http://www.gold-horizons.com/forum/

I'm in most of the private programs Min. are from $50 to 5k https://www.projectpcf.com/