Yurtgirl,with such an open attitude you will be most welcome. Gei di ymarfer yn Gymreag efo ni i gyd unrhyw bryd.
Yes,yes,yes to your children going to Welsh medium schools. You and they will fit in so much better,plus you will be giving them a priceless gift, which will be beneficial not just in Wales but all over the world (ie ability to pick up other languages.) This is the time to do it painlessly.
Furthermore,many 'good' jobs in Wales require you to understand and speak Welsh so get going!!
You will get a lot of support and help. Check out the website for 'Twf' an organisation devoted to helping families such as yours. 9Can't remember exact address-will be easy.)
Ignore the ignorant English who are puzzled by your interest and commitment. What IS it with these people??? Jeez, the English whinge about immigration and assimilation,yet they are the worst in the world!! Read in the 'Telegraph' that there have been demonstarations in Brittany as they are fed up with the English moving in,making bugger all effort with French and Breton and pushing up house prices.
Grrrrrrr!!! (I am half English myself BTW.)
Carmarthen is nice, my dh is from Aberteifi so am that way a lot. You will be welcome. Fire away with any questions. We will be glad to help.