umm the lack of water flow is due to water pressure problems. Your water might be coming from a water tower? Or they just didnt engineer the apartments right and the main water supply to the property isnt big enough. Basically theres nothing to do about that.
Go to homedepot, im sure they got shower heads that compensate for lack of water pressure.
as for the hot water, look for your water heater. Then turn the knob up that says heat.
One more thing...the guys at home depot might try to give you advice...but be skeptical cause...well they work at homedepot. Most of the employees dont know what they are talking about. This is coming from the son of a contractor who spent most of his child hood ont he job site or at home depot.
We all get the urge...Saturday early morning...nothing to do till noon...
The aural sensations of 1st gear WOT
**CGM **(Certified Garage Mechanic)