Hi guys!
I love analog photograph but I'm a huge dumb about it. My mom has an old Yashica FX3 super 2000 and I'm trying to learn some things with it. I took it to fix some things, it's supposedly good now but almost every photos that I took until now are ruined. This will probably be a very stupid question, maybe I'm just doing something wrong. In one film of 24 photos we can only see about 6 of them but they are very dark and the colors are distorted. And it has happened twice.
Here's some examples:

---_0007.jpg---_0005.jpgF1000008.JPG

Any thoughts about what could be? Am I doing something wrong, is it the camera, and how can I fix it?
Thank you very much in advance!!