WordPress Hunting and Fishing Site

I'm looking to build a website for hunting and fishing. 1. I have loaded the latest version of WordPress and a few plugins. 2. I would like to have the current theme changed and a background created to look more like a fish and hunting background. 3. The current theme is mobile friendly and I would like to keep it that way. 4. I would like theme changed and I will upload it to my site but if you need access please let me know. 5. I can provide the URL if needed on request. 6. I will need some advise on plugins to use for video and photos but I thing I have found a good one. 7. Also I would like a shopping cart that will that will work with PayPal I can load this or you can do to make it look like part of the site. 8. Please ask question if you don't understand.