Regarding the waits, SQL server performance dashboard shows below (taken at 11:20 today)

Wait Category..................Number of Waits..........Wait Time (sec)..........% Wait Time

Parallelism...........................724065872.................6319246.421...............28.06%

Other................................1232197629................5075559.493...............22.54%

Sleep.................................425224734..................4091093.732...............18.17%

Latch................................1642991523.................3378139.014...............15.00%

Buffer IO............................148173427...................2212876.593..............9.83%

I am not sure whether that seems good bad or normal! Apologies for the dots....