Seeing your status as a new comer here, I suggest you learn about the basic of crypto currency on what is it and how does it work in the first place.

You can actually invest money to buy bitcoin or alt coins. Unlike bitcoin, alt coins are risky to hold. So I suggest you pick alt coin from top 25 in cmc. Don't wanna spend money on it? Then joining bounty campaign might be your best option. Since you have a Jr. Member, it is eligible to join signature campaign here. Simply, find one of them in Bounty Forum. I hope it helps.