I want to try surfing out but I'm so scared of the high moving waves and how deep the water is.
I don't know much about it, do you need any equipment to surf?
Yes of course a surfboard and some people use knee boarding surf matts.
How do you know which beaches can be surfed or can you surf at all beaches?
That I'm not sure seems you may know a lil more then me being I never been it's just a fantasy I think I seen online it depends on surfers riding of a wave.
It looks dangerous to me but fun. I am think you need good sense of balance to surf?
You would defiantly need a good balance because those waves can get so strong in the ocean, lake and rivers it is pretty dangerous. 
I can paddle board so I wonder if those skills would help with surfing?