nevergoogle knob pockets (as we called them at college because of their shape) are easy to add to a side seam. Make sure the opening is big enough for your hand to fit in. If you are concerned about it make a toile first out of a similar but cheaper fabric and you can make any mistakes there. If you pop a retaining row on the pocket lining it should stop the fabric rolling forward.
I'd go with the Vogue pattern myself as it's a basic shape you can alter the neckline etc for yourself as you get more confident.
Also, invest in some dot and cross paper and trace off the pattern onto the paper. You can make loads of changes and never ruin the basic pattern. Once you've got your dress as you want it and the fit right you can transfer the paper pattern to card and you'll be off making loads! I find that on both paper and card patterns if you put some masking tape on the corners before cutting out it helps to keep the corners sharp, but then I'm a teeny bit obsessive about keeping my patterns nice 
Don'tForgetYourBalanceNotchesTiggaxx