How can I cancel iCloud Photos?

I know my Music is taking so much space, but I’m more worried about Photos.

Months ago, I was playing around with my Settings. I accidentally clicked ‘Sync’ for iPhone Storage. It wasn’t a big deal until a week or two. Every time I check my storage, it’s still uploading all my photos. Still uploading character bases, my references, color palettes, etc.

However, I save most important images in Files. Like my digital character drawing with a color palette, for example. It’s been almost a year and it’s telling I’m running out of storage.

I did ask my mom to pay for more storage but she said no. All I can do is delete photos I don’t necessarily need. I don’t like doing that because I’ll just be add more anyway!

Questions I have:

1. Will it affect my data if it’s unfinished, incomplete, or paused?
2. Will I have to tell my parents to cancel iCloud Photos?
3. Do I have to switch to ‘Download and Keep Originals’?
4. Do you need me to clarify anything in this topic?

(PS.: I’m on Family Sharing and I have Restrictions, so I don’t have an ability to view my Apple Account besides from my parents.)