Hi, in the UK there is legislation which means that companies who provide public access such as shops, salons etc have to make reasonable adjustments to allow for disabled access to their services. This doesnt mean that they have to spend thousands of pounds on ramps and lifts, it could just be something as simple as offering home visits for their services, but what it boils down to is that a training provider should not be turning you away because you cant access their building, they should be making provisions to accommodate you even if that means a tutor coming to your house.
I am salon based but I do offer mobile appointments for people who have difficulty accessing the salon. We have two steps up to the front door of the shop, then there's another step into the nail/waxing room and as a small business we cant afford the adjustments to make it wheelchair accessible, but I'm more than happy to provide mobile appointments in such cases.
If a training provider or salon turns you away for reasons connected with accessibility you might want to bring the Equality Act 2010 to their attention as they are actually breaking the law