I got 55% Marks, what should I do?
Select a course you are really passionate about.Marks are not always the measure of your hard work or skill. Continue to work hard ...Find a dream job... Select a good college that will get you there.
It's okay that you've got that percentage. With this percentage also you can pursue engineering in some government/private colleges, if and only if you've taken their respective tests.
Choose the wise decision.
All the best.