Atheism "rights & wrongs"?

[robvalue]

Good for you for giving this so much thought

I can help a little regarding transgender. With most people, their brain map of their body matches their sex. But occasionally there can be a mismatch, where the brain is wired for one sex but the body turns out to be the other. This causes a disconnect between what the brain expects, and what the body actually is. So they are literally a man in a woman's body, or vice versa. This can be extremely upsetting to deal with. (That may not be the best explanation, but it's a start )

Morality is a personal matter. We each think about how we think things should be, and we figure out how to act. If you want people to generally be happy and healthy, then do things that help people and don't do things that harm people. It's not a lot more complex than that. There's no need to look for "models" to follow. That is, I expect, the religious dogma still leaving its mark on you. Except for sociopaths/psychopaths, people have a conscience. It guides you by letting you know whether what you're doing is right or wrong. Religious people often mistake this for magic, but it's a result of evolution.

If you're not primarily concerned with making people happy and healthy, then there's not a lot I can say to make you care about those things. Trying to follow evolution is nothing to do with morality, instead it's some form of eugenics and leads towards Hitler type mindsets.