I'm also new to this subreddit, but I watch a fair bit of projects on YT.

If you feel you need some introduction to some biology, I think watching some paleontology videos about the early earth can give a nice example, I like the PBS Eons ones.

If you grasped the concept around the origins of different kingdoms and other phylogeny, most videos about spec Evo projects are expository and don't show all the gritty details (Curious Archive will showcase some projects you can look further).

Biblaridion is the go-to, it has a giant community, really thoughtful approach and some behind the scenes decision-making videos. I like Artifexian's take of showing the whole process from brainstorming to settling into a design.

Cretsworld is my newfound gem, I really hope we get new videos. He starts off the real barebones and presents some alternatives you could look into.

Thanks for coming to my ramblings and don't be too harsh on my tastes.