> I think its the « final » salary if that make sense? So this 4300 is the salary i will get. But just to know: if its not the case, what does that mean? Because im not 1000% sure

Ask your employer “is €4.300 the pre-tax or post-tax salary?” and use that specific language and have them be specific with the phrasing, too.

Pre-tax, that is not great, you’ll def have roommates and be conservative with your budget. Post-tax, you’ll do great. There’s a huge difference.