Blast off in any direction you want, as long as you remember Earth for what it has been.
Your local library will have the information on how to build a proper ship. Just ask politely the librarian for help if you need it. Helping you out enlivens their monotonous days. Perhaps while you’re there, you could stock up on knowledge outside of astrophysics, maybe biology, creative writing, anthropology, ways to prevent another form of slavery, feudalism, monarchy, and/or capitalism.
Wherever you go is bound to be interesting.
You don’t want to be a bad represntative of the human race. So please don’t make a bad impression. Don’t try to sleep with your newfound friends. Not only is the likelihood of it happening low, it’s just plain odd. Don’t needlessly pollute your new environment even if it seems fun at the time.
Plan your escape. All sorts of baddies know their exits; why shouldn’t the good ones? The universe doesn’t tolerate errors, particularly when it comes to wayward explorers.
Feel free to try to make an impact on the universe as a whole, but realize how challenging this is. You can’t go wrong with lists; make one for each project you plan to undertake. It helps in not wasting your time. But don’t worry, you’ll have plenty of time in transit to reevaluate your plans.
Space is Freedom. Do with it whatever you wish so long as
- you have the resources; and
- no one is stopping you.
Have fun, and good luck!