Thank you for your comment.

What I meant by serious game company is, a company that makes serious games for learning purposes. Sorry for the confusion.

Indeed I am learning a lot from this experience, and if I started a new Unity project now, it would be better in pretty much every aspect.

Also yes, your second point is really important. Spending time alone makes me depressed, but when they come in it is better. For now I'm thinking I can stay but on days like this where I'm alone it's hard.

The opportunity to get a degree is that, this is an apprenticeship, and so I balance between work and school and should get a master's degree at the end if I pass the exams