Dude get into coinmarketcap.com. List out the coins you wish to buy. Get into the chart and growth trend of each coins. Study and analyze their current move with their projects. Each coin line would have its own details and an option to buy the same coin. I find this site to be totally perfect and move forward and invest. You can get to know more and this would help you to interpret the current data of each coin. Each coin's data is detailed from the day each one was launched.