Can you please recommend a fabric store..not too expensive but where they will help me.

After having really sewn nothing but really cute 12" square pillows I once made as Christmas gifts, I have decided I am going to sew my own Halloween Costume. It's a simplicuty pattern Snow White dress. It has a bodice, an A line skirt, puff sleeves, a collar and a cape.

Please tell me I can complete this before I go to Disney on october 19th!!

(I have a factory sewing machine and a mom who actually knows how to sew!)

Do you think it's possible? Will I screw it up, or are the patterns pretty self explanatory? Any Advice?

And thanks for recommending a store for the fabrics and notions...


ETA: I just dd measurements and the pattern is too small I will have to resize it somehow. Any tips?