Depending on your budget, it can help. If you want to do a low amount, like 15 bucks a month, it really won't help a whole lot. I'd rather invest that in something else that would help give a greater return
I don't advise advertising until you've figured out how to grow naturally unless you really have a lot of money to experiment with. And I also suggest you take the free google adwords courses and even pass some of the exams. This can really help you save money and advertise more effectively.
Advertising used right can and will help you to more views and if the viewers find your content interesting some of them will subscribe for sure. But again it comes down to money. Do you have a budget or not, but a lot of things can be done by yourself but it takes time.but it can help to boost more views