With 190TT I assume you are fresh off an ICAO CPL/IR(ME) - just make sure you have a good scan as well as instrument skills in general. I don't know if I could have done it at 190TT but it won't be an easy ride (no pun intended).
Assuming its an EFIS a/c (simplisticly anything other than a -200) you might want to invest in something like the Aerowinx 744 simulator.
OK, its a Honeywell FMC emulation (similar to the Smiths though) and the PFD, MCP etc are a little different, but its a great intro to Boeing EFIS and Systems in general and normal/abnormal procedures.
Buy a copy of Bulfers 737 Cockpit Companion as well.