There is an old saying that "something is not a mistake until you fail to correct it".
I think the point here is that it is more important that you learned something from this experience that you can use to help you in the future, rather than whether this venture was successful or not or what you should or shouldn't have done.
Being able to look back on it to see if there were signs you missed, if you learned something about yourself and in being in that situation that will help you in the future and how you can tackle this the next time around, are all important parts of learning about life.
When I was about 22 I packed everything up and moved across the other side of the country. I didn't know anyone and my biggest fear in life was that I didn't want to be alone. It was tough and I haven't felt more alone than I did at that time in my life, but what I learned was that it didn't kill me, so everything that I worried about turned out not to be true.
So while this worked out for me, I never would have known that if I didn't try it to begin with, so the fact you gave it a go has given you invaluable insight into where you are at, something you never would have learned had you not done it at all. So many others would have never done it and just assumed what would happen, but you took action.
There is nothing stupid in having a go