Yes, they do need breaks. They're only human after all.
Unfortunately, public speaking is not my forte, so not likely to happen. I don't have that particular gift. I have the same problem when called on to perform - I play classical guitar. Peformance nerves have been an issue for me since childhood, & still not managed to shake them off. Not as bad as they used to be though.
A lay reader (in some jurisdictions simply reader) or licensed lay minister (LLM) is a layperson authorized by a bishop in the Anglican Communion to lead certain services of worship or lead certain parts of a service. ... Anglican lay readers are licensed by the bishop to a particular parish or to the diocese at large.