How do I render?

[snow hare]

Theres a lot of RedNote artits I look up for and I'd like to learn how to draw like them. I came up with a drawing idea (First picture) and now im completely stuck and don't know what to do 😭
I also pinned two drawing from RedNote artists as examples of what I'd like to achieve

Any tips ?

Credits :
433730634
1844037446

[woeful gate]

I think first you need to get a background colour, the background decides the shadow colour. those two examples you shown have a very simple background too. next is to add reflected light (usually reflecting upwards) to add more 3d effect, and darker shadow for area where it's harder for light to reach