I would say lots:
-Come out now. Don't wait till 35, you'll miss out on a lot of life.
-Your dick is thicker than most. No one will look at your non-muscle builder body. That won't change.. They willl envy your dick. Even the married ones. Whip it out more and be proud of it. But don't get cocky.
-Travel when you can, even if by yourself.
-Try some weed.
-Ignore your brother. He's even more useless than you think he is. Let him spiral down on his own.
-It will take years to find your soulmate. You'll be alone a lot. Enjoy the "me" time. Travel. But when you meet him, life takes off like a f***ing rocket. It's scary at first when you know you found him, but it's a good kind of scary. Trust your gut.