I am going to look into riding with a group this spring but I am terrified I will be left behind!

Just a couple limitations: I am terrified to let go of my handlebars (although I can use my right hand to drink out of my water bottle while riding), my reaction time is too slow to avoid most potholes (my vision was recently corrected with contacts so it should be a little better) and I am slow (okay, so it's an understatement) on hills.

Also, I would appreciate any advice you can give me about riding in groups: all the little things before I get started (like the manners your mom reminds you of before you go play at your friend's house )!

Thanks in advance!