Hello Alli and welcome! Always good to see new freethinkers join the group. It's important for non-theists to organize if we're ever going to change the way we're viewed and treated. Our politics need a serious overhaul as well .. you may want to consider looking into the National Atheist Party. I'm a member, they have Chapters in every state .. and are growing...!
Please consider joining a group to meet people and talk about anything that's on your mind, Hang With Friends. I like Philly too, though I seldom come into Center City. It's a liberal environment.
You might also like Women Atheists, Female Atheists, and possibly Feminist Atheists. After you've searched for stuff that interests you in "Groups" above and in the "Forums", don't forget to look at recent activity which hides along the right margin of the page all the way at the bottom.
Welcome to this world of rationality, truth and peace, where common sense and science lead to freethinking wisdom --- as you found out in becoming a atheist. You should find plenty of good friends here.
We invite you to make friends by joining the busy group "ORIGINS: Universe, Astronomy, Life, Earth, Humans, Religion, Gods, Atheism, Evolution, Darwin..." with nearly 700 discussion topics and over 3400 members.