In order to invest in an ICO, after you did an account on Coinbase and bought your BTC/ETH, then you gotta search for a good project to participate in the ICO. One such good project that is still in the ICO is #Blocnation. Excellent use of the BNTN token - to pay for a drink at Tomorrowland, the idea is already working and being successful. As long as you would like to participate in this ICO, you should buy KMD.
Next step should be to create an exchange account such as Binance that has most of the tokens used to pay for a new token in an ICO.
So after you create a Binance account, send your BTC/ETH from Coinbase to Binance account, buy the coin accepted in that ICO (in this case KMD) and afterwards send that coin to the address that the team has provided you. That is pretty much it.
Take a look at this project that I told you about and make your own decision to invest in it or not: https://blocnation.io/
Stay safe!