Preperation for aufnahmeprüfung

Hey everyone so can u all please tell me how did u all got into Studienkollegs, the method u used to prepare for Aufnahmes. When did u guys started?

I am aiming for a T-kurs in Studienkollegs mainly munich berlin KIT and konstanz for this summer sem 27. Mainly C-test is but also the Math as am not sure that i could pass as I am not an ace.