I couldn't agree here more. I still have moments, especially when trying something new, where the light comes on and things suddenly make sense. I'll try and try and fail and fail and then suddenly it'll make sense and it'll become easy.
I do agree with everyone that you may have bitten off a little more than you are ready to handle just yet. Start off with some washclothes. They're small, they're usually pretty easy. If you screw one up you don't get as frustrated if you have to rip it out, or it really doesnt matter since its just gonna be a washcloth anyway.
Don't get frustrated and give up. Get frustrated and get determined. And remember that we have all been there, and we'll all be here for you if you need help. Funny tension, inconsistent gauge, slipped stitches, added stitches. All normal for a new knitter. You'll learn how to avoid them and fix them over time.
Don't jump in the pool kicking and flailing and think you're gonna swim. Sit in the kiddy pool and wade around a little first. Then venture out into deeper water.