Post Editing Programs

Hi everyone! 🙋‍♀️ I'm going to have about 3-4 months off and I wanted to take advantage of it to help my mom with her business, especially with managing her social media. The idea is to create attractive and good quality posts. What do you recommend for learning? Should I sign up for any post or image editing courses?

I was thinking of trying programs like Canva or Adobe Express, which I heard are easy to use for beginners. I've also heard that Photoshop is more complete, although a bit more complicated. I don't know if it would be worth a try if I take a course, as it could become a useful skill for me in the long run.

What programs and courses would you recommend? Has anyone else started in this world from scratch? I would appreciate any advice!