Yes, you can delegate to OCD and they will send you Hive in return. That's probably not a bad idea. All you have to do is go to your wallet and delegate HP to @ocdb for example. There are other curation groups that also accept delegations and return rewards - Ecency, Curie, Qurator... I delegate some HP to OCD, you can check it in my wallet details (in my profile).
Another thing you can do is follow a curation trail. But with 100 HP this doesn't make sense imo. Before the pump, when Hive was less than $0.20, I calculated just under 1500 HP for a 100% vote to be worth 1 cent. That 1 cent would then be split in 2 when you upvote, half going back to you and the other half to the author.
When you do get a bit more HP, then it would make sense to follow a curation trail. Following a curation trail means that you maximize the yield from your HP via automatic votes, because then your voting mana should always stay under 100%. For this, check https://hive.vote/ . You can start following a curation trail anytime, but your rewards will be dismal, if anything at all - I'm not sure if there are minimums to receive rewards from upvotes.