Which PE tools for these two issues?
Being new to photo editing in general, I'm not sure which tools I should learn about for two specific issues on my own. I've grown a little familiar with the spot healing brush tool to remove black specs and similar things. The images below are greatly reduced in quality but show the problems. I don't want anyone to actually work on these low file size images, but I really would like to know which tool(s) would be best for me to learn about for these issues. Please note that I have some hand disability, specifically poor coordination, so 'free hand' work is more difficult than setting a tool and just clicking.
This first I have only this one, and there is a bar of light about one third of the way from the bottom, I think a developing problem.

The second is more of a concern. I have a set of about 50 B&W images that were taken in 1975, near the end of life of my old college Olympic brand camera. These images have parallel black lines going in the direction of the (manual) film feed. I tried using the spot healing brush tool, and it did work okay, but it seemed to leave a line of softer focus where used. But because of my hand issues, I had to set the size a little large so when I swept along the line, I stayed on the line.


