The easiest way to understand this is with an example. Let's say you have a friend who wants to stop smoking. You might have this conversation: A: I want to stop smoking. B: Have you tried to give up? A: Yes, but it's hard. Every time I try to give up, I just start again after a few weeks. B: You could try wearing nicotine patches. A: I've tried wearing them, but they didn't work. B: Why don't you try using an e-cigarette? B: Mmm, I might try one. If you try to do something, this thing is difficult for you, but you attempt to do it. This is your goal. "I'm trying to give up smoking". If you 'try doing something' you do this thing as an experiment, to see if it will help you achieve your goal. Someone who wants to stop smoking could 'try wearing nicotine patches' or 'try using an e-cigarette'. These are ideas that may or may not work.

in these cases, "to do" is the infinitive form, whereas "doing" is the gerund. There is no difference in meaning between "try to do" and "try doing". Sometimes, the infinitive form and the gerund are interchangeable. You can use either. "Try to do it yourself." is the same as: "Try doing it yourself." But sometimes, the infinitive form and gerund of a certain verb will have different meanings. For example: "I stopped to smoke." (infinitive form. This means I stopped (walking/working/etc.) to smoke a cigarette.) "I stopped smoking." (gerund. This means I stopped the action of smoking. I no longer smoke.)

Doesn't seems to make any difference to me. :o It means the same thing.