Take a cue from books you love, and from life experiences. For example the first book I wrote is in the same writing style of S.E. Hinton when she wrote The Outsiders. It took me over 10 years to finish, but that's because you can't force yourself to sit down and write unless you're a professional writer. You need to let it come to you whenever. If that isn't helping you start with something generic to get the creative juices flowing. Like with me the first short story I wrote was about an assassination attempt on the president. A billion writers (both professional and amateur) have written something to that effect. Also what's something you absolutely love? Sports? Video Games? Music? Something else? Draw inspiration from that too. Another fairly easy topic is religion. Whether or not you're religious doesn't matter. If you're writing fiction anyway. Pick something you find interesting and make up a story. The easiest way to start is 3 simple steps. Know the beginning, middle, and end. You don't have to have all the details. In my opinion, stories are typically better if they flow organically, instead of being forced. The first paragraph is always the hardest. But once you get a bit past that the story often writes itself. So know where it begins, have a general idea of what you want to happen to the protagonist, and know where you want the story to end. Once you've got that you're a lot further along than a lot of people. Or if it's easier start with poetry. It doesn't need to be a limerick. Just let your words flow, and pay no attention to how anyone else writes poetry. For me poetry comes completely absent minded. Another style that I have tinkered with is snail mail. Make each entry a letter that someone is writing to someone. For example a soldier writing home in the middle of a war. Let their letters tell the story. There are tons of things and styles to write about. If you want I can give you a link to the stuff I have written. That might help get the ball rolling for you. Bear in mind that everything I have uploaded is still very deep in the editing phase, so nothings polished yet. There's one story that I'm going to take the chapter links down, because I'm re-writing a huge chunk of it, but the rest is fairly readable.
Just remember not to get pissed at yourself if you hit writers block, or don't feel inspired for the next 8 months. You just have to remember not to force it. And don't expect yourself to be Shakespeare. None of us are, and to expect it, especially with the first thing you write, is just plain unreasonable and illogical.
