Hi Grace! Off to Floyd already? That seems like a huge lineup. Hopefully you don't have the 7 am slot.
Always promote your music when you stream. The UK should be the first country outside the US that you tour. Specifically England and Scotland. Mary Unknown7 has a large audience there. You could probably borrow some songs from her set for Esther to sing in your band. Sure, people might think she's Mary. Wouldn't that be great? Don't tell them that, though. Study your venues thoroughly before you go. Make sure you capture the Cocteau Twins fan base.
Princess Diana was well before your time, Grace. You might not even know who she is, but she was huge during the 80s. She was the Michael Jackson of the British royal family. What do Princess Diana and Mary Unknown7 have in common? Nothing really, other than a large wardrobe and a selfless work ethic.