Welcome to Atheist Nexus with its 8000+ good friends
A useful group to join, with its 130 discussions and numerous video films, is “ORIGINS” (Origins: Universe, Life, Humans, Evolution, Religion....).
One discussion (over 70 posts) is "Proud to be Atheist". It is very difficut explaining things to entrenched family members, but at least you can feel good internally. There's much to feel good about
because atheists and humanists hold the intellectual high ground——far from the mental slavery of superstitious people who submit to a narrow-minded controlling clergy with their imaginary god, heaven and hell.