Sometimes it's a good thing to test one's own boundaries and push beyond your comfort zone. However, there's nothing wrong with wanting to take your time, AND you shouldn't feel forced or coerced to do something you're not comfy with. If it feels like they are being too pushy about it, say so. Some metamours never meet and that's okay, too. There is no across the board requirement in poly that everyone must meet each other, or meet each other right away. If it would feel more comfortable to you, why not suggest just emailing or having a phone convo first, or that you wait until you know how serious you want to be about the relationship.
Independent solo polyamorist seeking lover-friends willing to invest in friendship, companionship, and love, but without a need for partnership.
Never confuse commitment with exclusivity, love with ownership, nor sex with intimacy!
For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.
~ Carl Sagan