Investing in an ICO project is very simple. You need to select an ICO project (analyze its white paper and team), register with their WhiteList and as ICO starts, you will be given a contract number to which you will need to translate ETH.
Yes, agree with you. At now the ETH price so cheap,, you can check here:
https://coinmarketcap.com/currencies/ethereum/ All investors should buy ETH now, and waiting for a chance to invest ICO. Good luck