What OS should I run on my late 2013 Macbook Pro?

It is currently running 11.7.11, but I find most apps don't work on that OS. I would like to use this Macbook for general school work, web browsing, photo viewing, and possibly photo editing through apps like light room classic.

My specs are:

• MacBook Pro (Retina, 13-inch, Late 2013)
• 2.6GHz Dual Core Intel Core i5
• 8gb 1600mhz DDR3 Ram
• 512GB SSD(?)
• Intel Iris 1536 MB