Welcome to the forum lupyman!
It sounds as if you are managing well and it's great that you can carry on with your work. I hope you have good caring doctors and supportive family and friends. We have several male members in fact but don't hear from them so much - I am sure some will be along soon.
Rest, rest, rest, is the major recommendation for dealing with lupus fatigue which we all complain of more than any other symptom but that's much easier said than done. It is important to rule out all possible causes such as anemias, diabetes, fibromyalgia which disrupts normal sleep patterns, even thyroid. Often these are neglected simply because it's assumed men don't get them, like fibro.
Many people find the fatigue lessens when the disease is better controlled. If you live in the USA or UK there's another antimalarial called Quinacrine or Mepacrine that can be added to the Plaquenil. The combination can be especially effective for energising general disease modification and easing the most common symptoms such as joint pain. It makes the Plaquenil more effective.
Or maybe a steroid sparing drug like Imuran or Methotrexate, or MMF/Cellcept would relieve symptoms and enable you to reduce or get off the Prednisone.
If you are in the USA ask your doctors to check your DHEA levels. They are often low in people with lupus and a supplement to bring up to normal levels can improve general wellbeing. It must be taken with medical supervision though. Supplements can also help to reduce Prednisone needs and osteoporosis risks although its effects on men are not clear.
I wonder if you have been checked for blood abnormalities, called anti phospholipids. The tests are the " lupus anticoagulant" clotting tests and anticardiolipins. This condition can cause migraine like headaches and a host of other symptoms even when it doesn't cause major incidents like thrombosis or clots
You can of course post on any forum section: men aren't limited to this one.
I hope you'll find the forum very helpful in every way
All the best
Clare