I was born 20 miles from North Wales. My childhood included many camping holidays in Wales, then constant visits through my youth into adulthood. But it was only 12 years ago, in my mid forties, that I even gave a thought about the language. People always spoke English when we went there !
My wife's uncle, gave me a book "Welcome to Welsh" which he had bought to learn his native language. Turned out he was born and raised in The Old Smithy in Llanrhaeadr. His sister, my mother-in-law, although born in Chester and technically English, was also brought up in Llanrhaeadr in the 1930's. Their mother was Welsh, but speaking the language was banned in their home, by the English father.
They returned there in their final few years, to see the family graves in the churchyard, next to the smithy and the pub. It is the most typical Welsh village. He was looking to buy the smithy when it came up for sale, but didn't.
My mother-in-law Ada, came to Wales to live, with us, for the last year and 1/2 of her life, and she loved it.
So, onto the reason I want to be a Welsh speaker is ...
to be able to speak to people in my local community in their first language, inspired by (Uncle Alf) who was banned from speaking his mother's first language.
"Welcome to Welsh" led me to "Colloquial Welsh" and other grammar books then eventually to SSiW which is far and away the best, getting straight to the heart of "speaking" the language.
(aRt rodent a.k.a. Steve F. on slack)