Try to learnd how to read charts. Try to see which ones are low which ones are at their high price range. Go with the one which are already dropped. Explore coinmarketcap, visit website of the coins attracting you. Determine your targets. There are tons of alternatives but doing so will lead you to a number of selected coins. Do not buy anything with advice, then you would regret it. You would say I could buy something else, it would also drpo but at least it could be my choice.
Then the rest is easy. you can choose one and wait.