I use Photoshop Elements 2018 which is a one-off purchase of about 100 sterling if I remember correctly. It has 'expert' and 'quick' and guided modes.
I downloaded GIMP and is has some great features but in spite of doing quite a bit of editing I didn't find it particularly intuitive.
Saint Jack - Some of the things Jimbo2Papa said -Try to teach yourself a little about colour and saturation so you will identfy what is wrong with the photo before you start.
Someof the autofix software features don't always get it right so some manual adjustment is needed.
Typically in old colour photos, the blues and cyans fade and the reds and yellows come through so these need adjusting.
Experiment with scanning at slightly higher resolution or as a TIFF file, but don't go crazy, it's diminishing returns on quality.
Remember with scanning, especially negatives that dust is the enemy. You can remove it afterwards but any dust and scratch removal compromises quality.
If you aren't keen on doing to much editing then maybe tyake the advice of Capn Bloggs and do as much correction as you can at the scanning stage.