help with lighting.

[swift wigeon]

I don’t mind if someone edits my drawing to help me add lighting, but I’m struggling on it and need some help + advice .

[hallow bramble]

the light is coming top left

Anything that faces direction of it or upward one will be on the light

While other one that don’t face that will be shadowy

[pine crest]

this is how i would personally do it, hope it helps a bit : )