Which university in USA should I opt to pursue MS?

No, you won't be eligible for an admission at FU Berlin if you do not get the minimum English Proficiency scores. The English Proficiency tests taken n consideration by Free University of Berlin are –

IELTS: 4.0-7.0

 TOEFL iBT: 95

 PTE (A): 76

C1 Advanced: 180

Yes Shiksha TOEFL online coaching is free in India is trustworthy. They have certified trainers and many students are taking the classes and getting good results. 

You just have to join the free TOEFL classes by Shiksha Study Abroad. They have expert trainers and proven results. There are more than 2000 students took the free TOEFL classes and got a good result.

Freezing during TOEFL Speaking is common. Practice speaking aloud every day, record your answers, and focus on pausing naturally between ideas. Over time, your fluency and confidence will improve.

To get a high TOEFL score, build strong English language skills and practice all four test sections. Regular mock tests and smart time management can make a big difference.