Hi Flyosaurus,
I'm new here too and like you would love to learn this hobby in 2021.
I'm pretty sure (from my very initial searches), there is a training centre in Sherborne, nr both you and I. details below, absolutely no idea what they are like or recommended.....
I think....whilst surfing, I saw a school in Dorchester too, but could be the same one. If I see anything else I'll post up on here. Now, I'm going to scour this site for all its worth!
Flight Culture
5 Lenthay Road
Sherborne
Dorset
DT9 6AA
07833 107902 john@flightculture.co.uk
Rick