Bridal shower advice?

So I wrote out the guest list for my bridal shower and it's at 15 right now but I'm hesitant to send the invites just yet. I have it planned for April 18th in San Francisco but with Covid right now, I can't book anything yet because the restaurant doesn't know if they'll even be open besides take out by that point. The backup plan would be to order food to-go and to do a picnic somewhere else but I picked the restaurant mostly because of the aesthetic and decor. But if they will be open who knows how many guests they can accommodate at once, you know? Back in October, restaurants could only accommodate 8 in a party. I'm hopeful that with the vaccines starting to roll out things will get better but they're not expected to roll out publically until early spring anyway. Idk how to go about this and I just need some help. Should I send the invites out now or wait til it's closer to the date? I can't even make a reservation until 30 days before the date bc of the restaurant's policy. Should I just warn everyone that there's a possibility that not everyone could attend? I don't even know how to prioritize my guest list because everyone is so special to me 😥 if anyone has had to deal with this please let me know your thoughts!