I'm glad you're enjoying your time with the game! Thanks for taking the time to reach out.
Helping you progress specifically will depend on what creatures you are feeling stuck with. Some of them are a little more particular about what order they require you to interact with them in. You may try the same interaction more than once and see different results. Most curiosities you can find outside of the mansion grounds around the island. They aren't all found outdoors either if you haven't explored the indoor areas much yet.
If you've tried all that though and explored everywhere you can find or think of, and you're still feeling stuck and want some more specific directions, let me know what area you've managed to reach within the mansion and what creatures or part(s) you are feeling stuck at specifically and I'll give you some more details if you'd like.