LMG is wrong place to be in contact with. Floatplane's support or Luke is better.
But overall, once they launch it anyone can join, I guess. Just keep in mind that you need subscribers to afford it. It's not going to be free service like YT. It's for getting extra income from people who are willing to pay you for early access or extra content. So you will need to have actual following first, FP won't be able to help you with that.
