Anyone finds themselves incredibly naive?

I am 26 and I feel very naive to the things around me. I feel as if now I am slowly realising properly that a world exists outside of my own head. It feels embarassing to realise this, and scary to admit that I don't understand basic things that people around me do. Budgeting and financing, managing expectations, understanding myself in a balanced way, managing responsibilities well. I'm now slowly trying to catch up, but it's difficult because I really feel as if I am really behind my peers. 

Something that is helping and it is hard, but to trust that some of those around me that I am well with won't judge me if I ask simple questions, and try to take my time to process these, instead of trying to force myself to grow up quickly on my own, something that I have been used to doing for years.

Does anyone else feel this sense of naivety?