IELTS

MS and any PG courses are better, but the fees are very high. Moreover, I would suggest you to choose better career.

You should get the admission in Manipal University, Amity University, and Delhi.
Or
You also get the admission in IIT and BITS, but to get admission in IIT and BITS, you have to clear GATE, but keep this thing in your mind, GATE is a very tough exam. All the best.

Without clearing your backlogs, you won't be able to go to Germany for mechanical engineering, hence clear your backlogs first and then opt for Germany.

Hi, its about time management. The strategy used will differ from person to person. Ideally 3-5 months are required to prepare for the test. You must schedule it accordingly. Always begin by taking a practice test as it is a good practice and it shows your current aptitude skills and areas that need attention. You may plan out your study routine accordingly. Besides working on weak areas give your best at the areas you are confident in, these are the areas which will help you score higher. Read a lot, learn new vocabulary, follow current affairs, journals, etc. Above all, eat healthy and relax.

Hi Nishant, IELTS is taken to study abroad and to meet the English language requirements. IELTS is also used to work abroad. The IELTS score requirements are different with different programs and universities. The scores are based on a band system from 0 to 9. A band of 6.5 is deemed good. You should check here for more details:
https://www.ielts.org/

You should better try again and score a minimum of 6 bands. Then you can surely apply for Canada.

Hi Krunal, unfortunately the number of backlogs are too huge and worrisome. You can try applying with a very good application package. You are also advised to check other options. Try European countries.