Please note that OTRv3 has laughably insecure encryption these days (1024-bit keys etc). There is OTRv4 in progress but it isn't ready for use yet.

https://bugs.otr.im/otrv4/otrv4

The interface for Pidgin is exactly the same as it was back then (it still uses GTK2), modern users have much different interface tastes in 2022, so you might find it difficult to convince people to use Pidgin.