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I've never used an asbestos test kit as I'd always call in specialist.
Specialists have air quality monitoring equipment that they use before during and after work is carried out. Asbestos clings to surfaces and doesn't degrade so a small amount will hang around in you house for along time.
You need a lot more than a mask to keep you safe. Your shoes shouldn't have laces, you should also wear disposable overalls. Masks should be FFP3 rated although this won't matter at all unless you know the mask you are wearing is the correct fit for your face and that it hasn't slipped.
I've attached the HSE advice sheet for self employed contractors who carry out non licensed azzy removal, it is worth a read, but as I said I'd always pay someone who knows their shit to carry out the removal and have actually walked away from jobs in the past when clients didn't want to pay for this.
Test for asbestos first. Search online and you'll find a link for a place that sends you a sampling kit with a mailer.