Anyone have experience with..

shopify. I am using them for a new site and I am able to make small changes here and there but since I'm really new at this stuff I have some stuff I can't figure out. I'm noticing that many people can't help me b/c they have no idea how their set up works. If anyone knows anything about it and has any experience changing the javascript can you let me know. I would appreciate any help I can get..lol. :sigh: