expand (one's) horizons
To have or seek out new experiences, especially if one's experiences have been relatively limited. I'm really nervous to live at school, but I know I need to expand my horizons and get some experience living without my family. I can't believe that Molly has never left the state before! She seriously needs to expand her horizons!
expand one's horizons
Fig. to experience and learn new things. Read more! Travel! Go out and expand your horizons!