@Potterkun Welcome to the forum! Glad to have you.
When everything is outlined in black, the piece will have that air of cartoony-ness. You can experiment with using more ink for shading to give it more texture and depth, or have the background elements be lineless. That's what I'm working on for my own style - I love linework, but am learning to use value/contrast to define shapes too.
Your composition has the subject right in the center, which can make a piece feel...too balanced, neutral. Try using the "rule of thirds" to place your character to the right or left to give the piece more energy.
I think approaching this as an environment illustration with a character in it might be a good approach. Try playing with sizes (small, medium, huge) for the environment to make it more engaging. The character, log, tree, cloud all kinda feel like they are the same "size."
This one even has a mouse kinda in the middle, but the play on sizes (tiny mouse, huge log) makes it interesting:
If you have an SVS subscription, I recommend checking out:
- Creative Composition 2.0
- Environment Design
- How to Ink 2.0