These virtual coffee mornings are using a piece of software called Zoom. This is installed the first time that you click on this link:-
If you have not previously used this, say for our Sunday morning service, I suggest that you install the software well before the virtual gathering is due to start. It is neither a large nor complicated install, but you do have give the programme permission to do various things (click here for some example details). If you get the installation out of the way, you can then join the coffee morning or the Sunday service directly by clicking again on the link above.