Businesses with a "real world" physical presence are both allowed and encouraged to apply for a listing in an appropriate
Regional branch category. Submitting in a Regional category should have no effect on your Topical branch submission. It will be in a different queue, and is likely to be reviewed at a different time by a different editor.
In your specific case, it would be somewhat difficult to recommend a category, since your location doesn't appear anywhere on your website that I could see. A Regional/ branch editor reviewing your site would likely have the same difficulty, and might not list it for that reason. If you included an address, it would help a lot.