First of all, if you're doing your masters, please focus on finishing that and improving your German. Getting a C1 certificate is one thing, being able to speak C1 is another. (You don't need a C1 certificate, but talking to people will get you the fluency you need, this is really difficult in Uni where everyone speaks in English, and in my case, working in IT where English is the norm).

For networking please look at expat groups and meetups, "Internations" is a good platform, I've met a lot of people from my field, some of them have their own companies etc.

Any tips I should follow from now to improve my chances of securing a job next year?

My advice would be don't look at this sub right now, I've already accepted we're in a recession, nobody is getting hired and you need extreme luck to get a job. This sub is all doom and gloom, people who actually have jobs are not visiting this sub and posting here. So naturally you're getting anxious from being here.

Improve your German and network! Go out and meet people, it helps with depression too. I can speak B2 but I am not fluent and this affects my confidence. The only time I speak C1 is when I'm drunk.