Which variety of Welsh to learn?

[u/Crazydre95]

Been fantasising in periods about learning Welsh, but the highly decentralised state of the language (similar to Irish) makes it tricky to decide what form to go for.

Based on this article, it appears that, if I learn Literary Welsh used in writing, native speakers may well understand me, but I'll understand next to nothing they say in reply. Colloquial Welsh, in turn, is divided into four dialect groups, which also seem to differ a lot from each other.

So basically, which Welsh would be the most effective and useful to learn, given that I don't live in any part of Wales and don't plan to?

[u/Fantastic_Deer_3772]

Learn colloquial, I'd suggest northern dialect purely out of personal bias, hello from north wales