You know all those things you learned on your own? You are going to need all of them.
Don't worry about being labelled a geek or a nerd, you have a remarkable career ahead of you. You know all those people you knew in high school who were fascinated by space flight but somehow never got the qualifications to do anything and fell away into boring jobs? You will be designing spacecraft.
When your future wife appears (next year), you will know it instantly, so don't worry about lack of success with girls.
Your sense of humour will be half of what keeps you alive. Your dogs will be the other half.
There is a reality to religion, but it doesn't even remotely resemble what you have been told. The reality makes sense, commercial religion does not.
If you can't understand how something could possibly work, it probably doesn't.
You are on a path. You will learn what you need to know in time to use it. You have a destiny.
Marriage and children in your future are not as insurmountable a difficulty as you imagine.