Yeah, Photoshop is kind of the default, but honestly there’s a lot of great niche stuff now. For 3D, Blender has a steep learning curve but it’s totally worth it if you stick with it—especially for backgrounds or posing models. For 2D, Procreate on iPad is amazing if you like drawing by hand, and Krita is free and surprisingly powerful too. If you want to see examples of what people are making with all these tools, you can always check out
https://18comix.org. A lot of artists actually list what software they use in their posts, so it’s a good way to get ideas. Personally, I switch between Clip Studio and Blender depending on the project. Once you figure out the workflow, it’s super satisfying to see your work come together in 3D and then finish it off in 2D.