Hi Diogenes,
Welcome to our community! 
As for me, I mainly use Photoshop and Illustrator because I’ve owned a licence for many, many years before Adobe introduced their subscription system. If I didn’t have a licence, I would probably use GIMP, Krita, Inkscape or maybe Affinity Designer (not free but very affordable). That would depend on the project.
If you are looking for a software, test it before using it. Then go with the one you like best and which helps you create the assets you want. Nowadays, there are so many great free programs.
Please feel free to ask our helpful community of students for further recommendations over on our Discord chat server.
See also:
- Forum User Guides : How to mark a topic as solved