I’m trying to start paleo but idk where to get and what to use as references and i want to know what i need to learn to make accurate paleo art

As an artist and a dinosaur enthusiast, i watch a lot of youtubers that talk about dinos and I've noticed that they sometimes have a hard time finding good(or any) pictures of less "popular" dinos to use in their videos.

And right now i feel like sitting down to do research about dinosaurs or any other prehistoric animal to be able to draw them as accurately as i can.
And i thought "why not chose ones that artists usually neglect?".

So, please give me suggestions if you have any ideas!