There's more people than you would think that like to take it easy when running stuff. I lucked out and most of the people in our FC feel this way.

It's best to be up front and not give any crazy promises. I've met some really nice people joining our primal learning parties by putting in the party finder listing that our group is not all English speakers and that we will likely die a whole lot learning the fight even if we know what to do.

Also really important is not to freak out or get too bummed out if someone decides that the FC is not for them. Some factors like available play times are not really anything you can fault people for.