S’mae? Lapsed learner here up in North West Wales who was relatively fluent and competed in the National Eisteddfod a couple of years before I joined Postcrossing.
Currently well behind on letters so not looking for new penpals myself.
Have a look for the Nofelau Nawr series of books. Books for adult Welsh learners, and they have vocab at the bottom of the page. One great author of these is Bethan Gwanas and she wrote the story of Blodwyn Jones (a Welsh learner…). I read the trilogy a while back.
Also, listen to the language. Via the web, you can tune into BBC Radio Cymru. Perhaps try a news programme.
North Wales Welsh is slightly different to South Wales Welsh! Anyone know the difference between frogs and toads? Well, the North Wales Welsh for frog is the South Wales Welsh for toad, and well, NWW for toad is SWW for frog! Or so I’ve been told!