(still wrestling with moving shit, but can't resist chiming into this thread)
I find improvising to be one of the most satisfying, challenging, and inspiring creative acts to engage in. It can be a tricky thing to get in to, largely dependent on your musical background, as some styles/approaches/instruments lend themselves (historically) well to improvisation.
I definitely suggest getting out and meeting people, if for no other reason that there are people likely in the same exact position as you, so getting together and playing can be a big growing experience.
I also find talking (critically) about improvisation to be very important. There's an old school mindset where "you don't talk about improv", which I think is a big copout. So improvise some, record yourself, listen to yourself, and maybe write down what you think. And/or play with others, and talk about how it went. Did you enjoy it? What did you enjoy? Why?
And listen to lots of other people improvising, both good and bad. I find that I take a lot away from listening to a 'bad' improvisation too as I get to unpack what I didn't like about it.
Aside performing and making videos, being part of a monthly improv night has been a huge part of my development as an improviser. I've played in hundreds of trios now at this point (10 year anniversary coming up this year!) Being thrown in that position over and over again (as well as listening to people being thrown in that position over and over again) has been invaluable. So if there's some kind of 'open mic' thing that's open ended, I can highly suggest getting into that.