I would recommend a pattern with straight cuts only and one that keeps matching points to a minimum. Rail Fence, Roman Stripe fit those criteria. If you are up for matching points, the 4-patch, 9-patch and alternating snowball block are good beginner patterns.
There are tons of You-tube tutorials and some real nice tuts on the QB - watch, read, shop and have fun.
I would keep the supplies to a minimum until you are convinced that this IS your new hobby. It can get expensive.