I have a combined policy , all tailored to my business needs.
For yourself it will be something like the following
Buildings, fixtures and fittings.
Stock and equipment cover.
Public and product liability
Then there can be add ons;- all subject to what you want or need.
Such as;- Increased personal accident for the therapist.
Extra cover for more expensive itmes in the salon.
All tailored to your needs.
Are you fully qualified in nails? I ask because normally a good training college will generally have interests in helping improve standards and thus attach a professional membership with an insurance company. So it makes it easy to gain the right insurance for what you have been trained to do. Maybe your training provider could recommend a specific insurer.
I hope that makes sense.