Congratulations @RCL87!
You're off to a great start 🙂
Great design is often about communicating more with less, and you're keeping it simple - so that's good.
However, you don't have any smiling faces of happy children - which a clothing seller (or in your case re-seller) needs to have. Subaru has branded their cars with the concept of "Love" and it moves more autos year-over-year than anyone expected. People nowadays are shopping online for the experience more than anything. Your job is to give them joy in being sustainable and stylish.
Which leads to: what kind of stuff are you selling? It was not immediately apparent that your site consigns and up-cycles children's fashion. That should absolutely be featured prominently on the landing page and be the first thing everyone learns.
Also, negatives are a no-no. (Get it?) "Non-Guelph Residents" is the literal first thing on your site (although not everyone reads or sees Announcement Bar info. Perhaps something like "Free Shipping starts at just $75 for orders from beyond Ontario!"
Good luck... and feel free to reach out with any more questions!