I wouldn't go with Drupal if your not a coder. Its a pre made CMS but it assumes a fair bit of code savvy from your end.

Joomla is made more for your purposes. There is a learning curve with the backend but its well worth it.
Add to Joomla the 'sobi2' component and you have a full online shop with several payment methods. You can add to that another component called 'Community Builder' and your members have extensive profiles linked to their shop accounts. Job done. All for free. (Except for maybe a few headaches, tantrums and other general unpleasant moments of near madness you WILL encounter in building the final product.)

Its all good but seriously - don't expect a walk in the park whatever system you use.

Good luck.