Ok mate. I previously owned a E46 330d manual and drove a 6sp 120d for half a year(same engine)
The low end torque means you can easily shift at 3000rpm and still go with the flow. Max rpm =4500 but when you shift at 4000 you will go fast enough.
Break it in nice and calm and with loads of different revs somewhere around/below 3000 or 3500 max.
Cold start:same thing.
Cool down after driving fast(er):keep the engine on idle for a minute or so.(because of the spinning turbo which needs to slow down first)
Cheers.
Robin