I think that, professionally speaking, Photoshop is the best option, it's the most complete of all, it may seem complicated at first, but after you start tinkering, you start to get the hang of it. However, to help with your post, I'll leave some options for other software: CorelDRAW 2021, Gimp and Adobe Photoshop Express (A very simplified version of normal Photoshop)
I don't particularly like the Gimp, it's cool, but I think it's more complicated than Photoshop, maybe it's because I spent my whole life tinkering with the PS and I can't get used to another tool