What if the microphone is on a stand?
Then you don’t need to worry about holding it, although the same mic technique applies with regards to keeping a clear, concise sound.
Mic stands are usually height adjustable, with telescopic fittings that you can unscrew and adjust before screwing them back into your preferred position. The height of the stand would ideally have the mic sitting just under your mouth.
The mic sits in a fitting which points the microphone towards you. These fittings generally allow quick release of the mic, should you wish to hold it.
Practice using a mic stand, as well as without, to see which you prefer