When I was learning, not very hard, I had my wife's father available as a Lewis native who used to have aeschemic attacks and forget how to speak English occasionally. Sadly he died in 2001. I could phone some of her other relatives but that's not a great solution as they are busy.

Some of those sounds are simply not in English and I had to have them repeated many times to get them.
That's the very best way to learn to gaelic sounds. I have been complimented on my Scottish accent in gaelic, although I am from Birmingham and Banbury in the English midlands by upbringing and have a normal midlands accent in English.