Scenery Tips?

Whenever I’m making a custom ride, I feel like I have to add 1,000 scenery pieces to get a good scenery score, and then my rides just end up looking clustered and random.

Are there specific types of scenery pieces, and specific locations on rides, that raise the score a little bit higher? I’ve tried watching content creators on YouTube, and it hasn’t really helped me, as I understand how to place scenery, I just am not efficient at it at all.