Meditation isn't something you can just "do" or "not do", and it's also not about suppressing thoughts either. Like any exercise, practice will improve it. You wouldn't expect to be able to run for 30 minutes solid without practice so you shouldnt hold your brain to the same standard.

Personally, I found mindfulness (Headspace) helpful and accessible, and I've found that yoga gives me the same mental stability I got from the mindfulness