Hello Siddharth,
To study in Germany, You have to be eligible, so for that they have set certain standards. which are calculated in the exams that you give. GRE, IELTS TOEFL, etc you will have to take and score well.
The difficulty level increases as the modules you keep passing, If you study well and smart, you can score well and move to Germany.
As far as financing is concerned there are various ways such as student loans or scholarships from the govt which one can avail
all the best
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