If you want Photoshop but don't need the latest version you can get some older versions free from Adobe, It's something they've always done to get people using their product in the hope you'll uprgade at a later date. I've had CS4 for a number of years now and it works just fine. The oldest version listed here is CS6 so two versions newer than mine.
Disclaimer. I didn't get mine from THIS site but can no longer find the source I did use. Although the URL looks ligit for Adobe, always use caution when downloading from a new source on tinternet!
https://adobe_photoshop.en.downloada.../old_versions/