A few existing threads to get you kick-started:
Try any of the following for quotations:
They’ll be able to advise what cover you need, based on the qualifications you have, and the relevant premiums payable.
Are you offering gel nail services without an accredited gel course certificate?!
I wouldn’t take the risk of buying such an integral part of your business from an overseas supplier, even if it does mean saving a whole heap of money. You may live to regret it if (a) it turns out to be poorly made or inferior quality, or (b) you could have trouble asking for a refund, or...
Most of the major nail training providers will be able to offer courses, but do your research well and you’ll be sure to find something which suits your requirements and budget.
Don’t be tempted by “one day” type courses though, they’re way too insufficient and there’s no way you can learn it...
Please don’t be tempted to experiment with products and chemicals before you have actually commenced your training. Otherwise, not only will you pick up all sorts of bad habits, but you could also cause serious long term damage.