well done!
you have just entered a room, and as you walked inside, the door slides and closes behind you. on your side, there is no handle nor keyhole, just a flat surface that blends in with the wall and seems to be a solid part of it. no obvious way to get it open. it remains locked.
in this room you only see a few things. a worn old table with stains, scratches and worn places, as a map to what it has been through all its years. around the table, a few chairs, equally worn and used. in a corner an old empty bookcase and a single painting on the back wall, leaning terribly and revealing there could be something behind it.
on the table you find a piece of paper.

perhaps lured here, but the mad mans faith in you does not seems to be misplaced. now, as you cracked the first code and find yourself here, at the start of a journey to which you do not yet know the objective or where it will take you.
your mission has a name. the name was the one you found when you stated this journey. you have also figured out that you need to work with the tings you find and decipher them some how. the name is your next mission and this is your first real task to crack.
behind the tilted painting, there is a safe. you need a 10 digit code to open it.