multisiremoonlight
I have questions... How can you tell you have abilities? What sorta things occur? How do you learn and do things? Can it kill you?
To answer your first two questions, you will see whatever you're trying to do, sometimes some things you're not trying to do, manifest themselves in front of or around you. But if you're looking for specific answers, you'll have to specify as to what abilities you may be referring to.
You learn to do these things with practice, control, and concentration.
Yes, it can theoretically kill you. Too much of anything can kill you.