1- majority of players hang around in mor dhona if people have general questions/looking for dungeon parties they normally teleport there since its the most populated map at most times
2- depends on what kind of content u were wantin to play with think 1st dungeon is around level 16ish but normally alot of players doin fate grind in various maps
3- theres a few newish worlds around not sure which data centre ur planning on playing in/best ping for you
4- i dont think theres really that many FC's around that exclude new players in my world odin im always seein FC recruiting for new or old players to join thier family

merry christmas n welcome back hope u enjoy urself in game :3 sory i couldnt give more helpful info tho