My follows are mostly bitcoiners, so I don't have a lot of specific recommendations for you, but I did have some success searching for hashtags #ethereum to find nostr:npub136vtgm9q3k2jkeveyhgl5mt5hjdvmcs8kcaf2nhd2d7thc4z5xaqru0qyr. Not sure if the #tron hashtag has really taken off, but maybe you can help 😂.

Another strategy to apply is to actually log in with someone else's Nostr pubkey. You won't be able to post as them, but can see exactly what they see and maybe find better follows.