I like your title!
I’m on the fence about your line. On one hand, I really do like it. On another, it seems like it might be a cop-out. It really depends on the rest of the story as to whether it is or not.
I think you should try to tighten the sentence a little more. Like “He was positive that dying was the easiest decision he’d ever made.”
You should aim to say as much as possible in as few words as possible. Think of it like a shooting star. A shooting star is stunning but fleeting. It makes you want to see more. If your first line is like a shooting star, then you’re sure to capture your readers.