I wish I could wrap these ideas up in a box and give them all to you as a gift to use and enjoy without you having to work so hard to “get it”. Unfortunately, I can’t. This level of peace/joy is not found by everyone. Jesus himself said that the few will find it (although many will be saved). Many will find this peace and greater peace in heaven even though they never found any of it here.
It takes a seeking. I know this because Hebrews says that God is a rewarder of those who earnestly seek him.