There's a lot of good info in here so I won't repeat. I will say congratulations, and the fact your reaction is to freak out instead of party like it's 1999 see

There's a lot of good info in here so I won't repeat. I will say congratulations, and the fact your reaction is to freak out instead of party like it's 1999 seems like you're in a good start already. Take some time to read the advice here and do the "right thing" for you. My only other input would be to take some percent of it and use it for some cause you find worthwhile, whether it be a lump sum anonymous gift or payments over years, or getting involved with your time.