InaSorry, late to this. Not on here much. Afraid I’ve got no experience of CW. Might be worth checking out https://createdtoread.com/creative-writing-workshops-groups-cardiff/
Regular Creative Writing Workshops & Writing Groups in Cardiff
If you live in Cardiff and you like creative writing, whether it's poetry or prose, then you're in the right place - there are plenty of regular writing groups, workshops and activities on offer, to suit a range of interests. NB. This post has not been updated since Covid.