Let me be the first to suggest something with a curve. Don't be scared, they're not hard. Drunkards path is a nice beginners block for curved piecing and if you enlarge the two piece pattern you can make a huge quilt in hours. I like to lay the pattern out in the Snake in the hollow arrangement. Search it out. It might interest you. It is really something to help increase your skills. Good luck with whatever you choose.
peace