Humour is a great tool for an MC and everyone loves an MC who is funny, but not everyone is funny.
Many MC’s feel the need to try a bit hard in the humour department and the strain can show. It doesn’t always work. If you are not naturally funny it’s best to be very careful.
Researching some appropriate quotes and some interesting facts and figures could be a better approach than attempting some jokes that you’ve never told before and probably the audience has heard before anyway, especially if you found them online.
Be an interesting person, warm and cheerful and well prepared and this will work just as well.