there are two types of people:
the ones who have a large follower base with good engagement who don't know shit about monetization or maybe IG in general
& the ones who know lots of stuff but are trying really hard to reach a high follower base (which is more and more difficult these days)
honestly, if you don't know what to do with 30k likes, just sell the account.
depending on your niche I'm pretty sure you are somewhere around +/- 1m followers depending on engagement. If you can't monetize an 1m+ account, well..
this all depends on the niche, you can't give a general advice. the same monetization method works differently on different niches.