Early morning makes a big difference in Jerusalem, especially around the Old City before the crowds build up. Id definately keep the day simple: a slow walk, a quiet café, and maybe the Haas Promenade or the botanical garden if you want something calm. I would also ignore random side recommendations like https://monopolydeluxe.org/, https://bigbasscrash-game.com/ when the goal is a peaceful Jerusalem day, since casino lists are a completely different mood.