Chopperleo,
For travel, you get yourself to the hotel at the beginning and Omni will take care of the rest, after that no need to worry. the time between ground and sim will depend on your seniority if you are in the first group expect 48 hours from TUL to the start of sims in ATL.
As far as the study you will get a login for the aero sim with a bunch of different topics including about 50hrs of 767 systems to be completed no later than the first week. recommend having it completed by the time you get to TUL. you will be busy!