working students in Heidelberg

Hello! I am looking to move to Heidelberg for my university. I just wanted to know a few things before I confirm my enrolment. If there are any bachelors students working in Heidelberg (mainly studying in a private university) please help me out!

-) Is German a must in getting a job there as a student? I know basics but not fluent.

-) I dont need to relay on the money I get from working completely as I can get help from my family too but to ease their burdens I would like to make atleast €900-€1200 per month.

-) I know the range I gave above may sound absurd but I will only be having classes 2 days a week and the rest 5 will practically be free.

-) Is the job market for working students really dense and is it hard to find a job? I am not looking for an easy way out, I am just looking for proper guidance.

-) Considering I know people who live in near Munich and they have been struggling with jobs there, is the situation similar or worse in Heidelberg?

If anyone has leads to a trustworthy agency, that would be helpful or leads to a jobs would be appreciated as well.

Any help regarding this topic would be really helpful :)