Personally, I think I see your answer, but I don't want to say...
I'm just going to say this: Look at your pros and cons. Read them carefully.
Your pros, well they sound great and exciting for you. Your cons, think carefully about this. I think you have done many things that you weren't sure you could do or not. I also think you will never know if you can or not if...
What do you have to lose? What if you went and it didn't work out? Would you go back? Find something new? Why do you think it may not work out? How would you feel if you turn it down? Would your regret it? It seems like your biggest fear is, "Can I do this?" Would you always wonder if you could have?
I am sure these are the things you are thinking about and already asking yourself. Read your list again. Put yourself in five years from now and look back at the questions from that point of view.
What a huge decision for you. What a huge opportunity to make a change. It is really tough. Good luck. I will be thinking of you.