Don't listen to people telling you to read some YA because classics are supposedly "too hard". Edgar Allan Poe can be quite easy to read, for example! Plus he wrote some short stories, which is cool. Maybe you can start with things like that.

My advice would be to avoid looking up words on internet as much as possible, or even worse, to avoid translating words in a sec if you're using an e-reader. Doing so won't really help developping some good comprehension skills, especially on the long term.Taking your time to figure out the meaning of a word by analyzing its context will eventually make the task much easier. It's a bit annoying at first, but it's pretty rewarding. If your english is fairly good, you'll get there in no time (: