I like bug fixes for starters but it needs to be a newer project or on a new feature. If you’re working on something we’ll established remaining bugs might be hard to fix. Basically newly reported bug are nice for starters.

Also I noticed you don’t really have any backend languages listed as what you’re studying. I’d recommend looking into getting a basic understanding of Java(specifically the Spring Framework), and SQL. Full disclosure I’m a backend guy so I’m biased lol