A funeral is not a time when people need to hear great oratory.
In fact, a brilliant public speaker may distract attention from the person he or she is talking about.
A funeral is no time for egos.
The words must not upstage the person they’re describing, nor must the person delivering them.
So it doesn’t matter if you aren’t an accomplished and experienced public speaker.
So long as you can be heard, that’s all that matters.