I have a creative world on Java Minecraft where I did some fantastic builds there, including a giant castle which I've not finished the interior of, but they're not compatible with bedrock edition and to be honest I'm not willing to join people who I do not know on a personal level or cannot trust.

Not being rude, but I don't feel I'm the right type of person to be whitelisted on your server.
I'm not a griefer, that's not the reason. Plus I've got projects planned on my bedrock edition realms who I have already whitelisted for friends only.