I've done a couple of in-person courses, but I'd really like to learn more vocabulary at my own pace. So far I haven't found much other than a couple of dictionaries (e.g. https://www.signbsl.com/ and https://bslsignbank.ucl.ac.uk/dictionary/), but it's not been hugely helpful in learning which signs are common in my region. I also find that just looking up examples of signs I don't know never really helps me learn.
They're obviously pitched at the level of fluent signers who use these as their primary way to use the TV, but I do find that between the audio, subs and thematic information, a lot can be picked up from the signer. English-with-subs is known to work well for foreigners learning English, and I expect English-and-signed might be good for BSL.
Where about are you based? I joined the bsl soc at uni and later did a level 1 course, so my level is rudimentary, but if you're in the west mids it might be good to practice.
I'm based in Herts/London, so a bit out of the way for a casual meet :-)