I am not very good at giving presentation and not in english speaking. Is MBA relevant for me?
These skills you have mentioned in your questions can be learned and that too in a matter of months. So you should stop worrying about these things and focus more on the entrance exams first. After the exam there is a period of 2-3 months till the interviews begin and more time till you get admitted. In this time you can focus on these skills and there are plenty of resources available both online and offline which you can utilise.
Hope this helps. Thank you.