There are many other groups using HTCondor, and they often have great ideas for how to solve problems that you may encounter –
UW Physics has some great information on using Condor on their site – https://www.physics.wisc.edu/computing/condor/
SIE wiki on using HTCondor, mostly for astronomy, but lots of good hints : https://research.iac.es/sieinvens/siepedia/pmwiki.php?n=HOWTOs.Condor
HTCondor has a YouTube channel – https://www.youtube.com/channel/UCd1UBXmZIgB4p85t2tu-gLw
HTCondor manual – https://htcondor.readthedocs.io/en/latest/