Studying alongside work is the magic word..
I don’t want to burst your bubble, Michi, honestly not. But this salary jump only happens in one out of 100 cases after a part-time degree.
I myself did such a degree after my vocational training and know many who have done it in various fields. And I am even currently doing a second degree, and I am almost 10 years older than you, and I still don’t even come close to the salary you imagine.
Please don’t be mad at me, but I strongly recommend you just save equity on a daily allowance account or something similar. If you want, also partially a home savings contract, if your plan still allows 6-8 years.
And only start the concrete house and financial planning once you’ve been on the job for 1-2 years and know that it is your dream job in your dream location.
Many require a lot of flexibility, especially as career starters; in that case, a house would just be a ball and chain and a reason not to hire you.
By the way, what field are you studying that gave you the idea of such starting salaries?