Dear Brayden:
Clearly you suffer from anxiety, an ongoing state of fear which is responsible for the derealization you mentioned. The thought or feel of not caring what other people think and of coming out is very liberating, making you “feel very on top of the world”. It feels on top of the world to not be afraid anymore.
Unfortunately, it is not that easy to free oneself of fear. And so, considering you shared that you live in a conservative society with mostly homophobic family, my answer to your question (the title of your thread) is No, you should not “just, come out”. Manage and heal from your anxiety first, for some time before you come out. Come out after you go through some healing and management of your anxiety.
You are not involved in a love relationship with a man, as I understand it, so there is no relationship that needs to be attended to as a reason to coming out. You already came out to some supportive friends, and to your oldest brother, so keep sharing with them.
anita