First thing you have to do is to know which coin have a  potential. Reading and keeping yourself updated with crypto market. You will require a lot of information and then transforming it to knowledge.

Then after everythig starts
Learn about tech behind cryptocurrencies (mintable coins, non-mintable coins, Blockchain and other tech stuff ).
Learn about cryptocurrencies trends of past year and whats going on currenctly. Select the best crypto coin or coins you are interested to invest in. Research about their tech more and follow the trends for some period. Learn the basics of crypto investments i.e. When to enter and when to exit. Make a plan your investment Goals. Keep following latest news and announcements. If you are done with above, You are ready with basic knowledge to be a professional crypto investor. I hope you have learned about of this and thank you.

To those newbie in cryptocurrency their are so many way to earn free money like joined in bounties, airdrop, giveaway, and etc.