You should already know how to do basic crochet stitches (ie. chain, single crochet, double crochet)
You should have very basic sewing skills
I love bags, particularly this size bag. I use them for everything: holding makeup (day and evening need separate bags), keeping my crochet tools handy (I need separate bags to hold the tools for each project that I'm currently working on - there 4 in the rotation at the moment), keeping my 5-year-old's 'restaurant activity supplies' out of the general populous of my purse, and for keeping emergency supplies (bandaids, hair bands, sunblock, neosporin, advil, etc) in the trunk of the car.
This bag is perfect for all of that, plus, it's got a poppy on it! Who doesn't love poppies?! You should get the pattern so you can put poppies on ALL of your bags... ;D