Both are correct but usually help me + verb "to" is not wrong in the sentences, but it is unnecessary , help me to get a job this sentence means, essentially, "please help me (in the future)". While that may be technically correct.

In this case, "to relax" and "relax" can both follow "help". The difference is so tiny that I wouldn't even worry about it. "Help" can work as a causative verb. There are only a few of these, so they're easy to learn.

Both are correct! You don't have a problem.

its either It helps me to relax Or it helps me relaxing Am studying English to help me get a job

Meh... I agree with the others who say there's little or no difference. However, I would say that "help me to get a job" is more grammatically correct and thus preferable in a formal document (such as a business or academic report) but "help me get a job" is much more colloquial and therefore should be used in informal conversation, even in business situations. But, this difference is so small that it's hardly worth worrying about.