Read. Read as much as possible. Read the big stuff, the challenging stuff, the confronting stuff, and read the fun stuff too.
Visit galleries and look at paintings, watch movies, listen to music, go to concerts – be a little vampire running around the place sucking up all the art and ideas you can.
Fill yourself with the beautiful stuff of the world.
Have fun. Get amazed. Get astonished. Get awed on a regular basis, so that getting awed is habitual and becomes a state of being.
A great start. Better being habitually awed than, you know, “serious”.