Hey! Your moose and owl look super cool. There are a few ways to make a character pop from the background. 1. thicker outline using ink around your character 2. create contrast. Either have a lot of detail on the owl or barely any detail on the owl with a heavily detailed background. (ex. your moose stands out because nothing is in the bg; it's white.) 3. See what other inkers are doing! Mark Morales is awesome: https://youtu.be/862pfBBB3cQ?si=NAD66tnGcHAii9Na

These are gorgeous drawings, @Judah Rojas. There a lot of different ways you can separate an object from the background -- line weight is one of them for sure. However, I really like that you used more a more dense amount of lines in the moose to make it appear darker and less lines in the lighter areas and the botanicals. That makes a really nice separation while still maintaining the same line weight. If you want to experiment with line weight, you could try using a thicker line weight around the contour of the owl. Use a spectrum of line thicknesses to avoid a coloring book effect. Think of the lines like shapes and design them to follow the form. You could also try adding more darker shapes in the background, in the form of thicker lines. You could place them where shadows might fall, keeping the parts in light at a thinner line weight. Personally I like that your lines are the same thickness. Playing with the density of your lines in different areas could be an interesting approach to explore as well. I hope this gave you some ideas. Good luck drawing :)