Build an Online Store

I have a WooCommerce account and have 'built' a wordpress store for my business. I am not 100% happy with it and want something that feels a little more professional and works correctly. I have tried to get the functionality I need but have decided to look for outside assistance. I am looking to keep my current WooCommerce set up and have the website tidied up and pulled together properly - I am not looking for a complete rebuild. Im looking for someone experienced enough to know what plug ins are needed and not needed, support me in knowing what am I best served using and to help me make sure the site functions as it is supposed to. I run a subscription service. People pay monthly (there are several tiers of membership) I post out goods to them based on their membership package, when they return them I post out more (think DVD netflix/lovefilm). I have set up these packages for my site but feel the functionality (buttons / layout etc) could be improved. Members will need to create a wishlist of which products they would like to borrow. I have installed a wishlist woocommerce plugin. I have uploaded a series of products. I want the wishlist feature to only be available to members if that is possible. In the first instance I want a fully working website optimised for PC use. As a secondary consideration I would like any extra features that would allow optimisation on mobiles. These two issues are currently in a little conflict as certain features look good on PC while others do not and vice versa on the phone. Priority is to get the system working so that I can be confident before fully launching advertising. Unless advised differently I do not expect the work I need to be difficult or too time consuming for a suitably experienced individual. I expect this to be a one time project but would be happy to revisit after a period of time for additional support.