You can join Luminar using the IP address: play.luminar.gg. Open Minecraft, go to Multiplayer, click 'Add Server', enter the IP address, and click 'Join Server'.
Every Minecraft server has its own gamemodes. Luminar features Survival, Pvp, and Economy. If you enjoy any of these gamemodes, Luminar might be the server for you!
You can join the Luminar Discord server and direct your questions there. There should be instructions on how to get support - If not, contact a staff member.
Luminar is listed as a Java Edition server. Check their website or Discord for any Bedrock/PE compatibility information.
Right now, there are N/A people playing on Luminar. Up to many can join.