I really enjoy the freedom e-books in general offer. More people are reading, which means more people are reading my work. It's environmentally decent (we don't have to destroy trees for paper but poisons can still be leached from most e-book devices) and handy (I take my Kindle everywhere because it's smaller than most books and is able to hold a lot of content).
All writers experience it; any who say they don't are lying. Just keep writing; it doesn't have be good, throw it in your slush pile when done, but keep your mind working until you break the block. In the end, it's just a matter of time: the more you try to break through it, the shorter the time.
Plagarism. Not only when someone doesn't cite your work but when someone alters your work JUST ENOUGH to bypass most copyright laws (and typical algorithms can't detect such activity, so someone has to let you know that it even happened).
Don't give up. People will criticize you, people will doubt you, society will tell you hurtful things that will make you want to quit. But don't. Write on, even if only a little each day, until you prove that writing works for you.
To be honest, I just wanted to tell stories. I didn't care if anyone read them, I just wanted them told. I wrote my first story in 6th grade, it was a short that I eventually turned into 'Creatures of the Night'. But I was always artistic and many of my pursuits were in that respect, so I didn't write extensively until I was in college.