This is where you want to go, if that wasn’t already obvious.
Heaven is a place of eternal, loving union with God, the source of all being, goodness, and beauty, the fulfillment of every human heart.
So how do you go here? Only by dying in in a state of grace through Christ in his Church. There’s no other way!
If you’re wondering how Purgatory fits in here, it’s a temporary place that some people who are sent to Heaven will have to endure in order to prepare for Heaven. It’s not one of the “last things” because it’s not a final state.