Thanks for your response Tim. Writing and recording is all fairly new to me. I'm not sure where I'll go with it really. I've been following Joe Gilder's content for a couple of years and learned a great deal about recording and mixing. I also took Ian Shepherd's home mastering masterclass and that too was a big learning curve, but ultimately worthwhile.
It is indeed a PreSonus Studio Live mixer, the Series III. It's expensive, but it's absolutely superb. I bought it to live mix the wedding band I played with, then we broke up. I'm kinda loathe to sell it, so if I can make it work for live streaming I'll be able to justify keeping it I think. I did consider getting out there and running live sound for other bands, but it's an island and there's a company that already kinda has that market sown up. It's run by friends of mine and it's a community interest company, meaning non profit basically. So I'm not sure how I would even complete with that! I can highly recommend PreSonus gear though. It's top drawer.