First message on SLS, what do you literally even type, im paralysed

ok so we made our profile last weekend, picked the photos, wrote the bio (took us 4 hrs and a bottle of wine), and it went live monday. since then we've had maybe 12 messages come IN which my wife is loving, very flattering, but the problem is we cant actually figure out how to send one OUT. im 39, she's 36, brand new, no experience, no club nights yet, just dipping toes. we've been scrolling for like 4 evenings now and weve found maybe 5 couples we'd both genuinely wanna meet. but every time i open the message box my brain goes blank. like full white screen. what do you say? "hi we like your profile" sounds like im applying for a job. anything sexier feels weird when we havent even said hello yet. "what brings you to the lifestyle" feels like a job interview going the other way. shes told me to just send something already bc apparently im overthinking it (she's right, i am). but i genuinely dont know the register. is it casual? flirty? is humour ok or does it land bad over text? do you reference something in their bio so they know youve actually read it or does that come off creepy. also do you send the first msg from the couple account "we" or do you sign off so they know who's typing? the etiquette stuff is killing me more than the content tbh. help a noob out. what worked for you. what got you ghosted.