Ask HN: Help on how to start getting customers

Ive built a SAAS product aimed at small take-away/restaurants. It provides EPOS, website and online ordering in a single package. Not revolutionary but works well. Android tablet and online based.

I have a single client (family member) who has been using this product in their business reliably for over a year as Ive gradually added functionality.

The product is still rough around the edges, but a lot of this is cosmetic or usability in certain areas.

What Im now stuck with is how to move this forward to get some proper customers. Theres maybe some mindset issues here whether i'm worried about whether the product is polished enough or how to actually get people to want to use it.

Any help, advice or starting points would be appreciated.