+1 to challenge of learning a language as an adult. I feel that once you get older, you aren't in as many situations where you don't know what you're doing. Partially because it sucks to not know what you're doing, so you avoid those situations, and partially because you simply get better at the things that you do over time.

It's been helpful for me to remember that for every expert, there was a time when they were the same level as you are.