As mentioned, NCS (although you're a little young at the moment) and DofE are great.
I would also suggest looking at youth groups (if you look at Youth United, they have many affiliated groups) - these are groups like scouts, cadets, etc. These are great at offering a range of skills and experiences. Equally, youth clubs around you may offer drama/dance/music activities. I would try doing a google or reaching out to your school who may know of such clubs!