Yes, you may take it off
I mean for me when I didn't realize i was practicing AKJ's rehit it was hard for me to sleep with a keski on.
If you believe keski as a kakkar (like AKJ) then you should probably keep it on and when you are showering you tie it around you waist and you tuck your kanga in there too. You then get your kirpan and tie it around your head after you washed your kes because it could rust (if you have like a wooden case over it then it won't be a problem but just incase).
If you think it will burden you then when you are reading nitnem I usually tie a towel turban. It makes it try a bit quicker and is comfortable too.
Veer ji, it's not right to say that Nihangs are better than other's. We all achieve to do one thing in life, to take Guru ji's amrit. We all achieve to read bani, do simran, etc. Yes, certain nihangs may do 10 sukhmani sahibs or whatever and that's good but if they are doing it in terms of ego then that's when it is wrong.
At the end of the day, we are achieving the same thing.