How to Fast Travel
This is kind of, sort of, a spoiler but fast travel is in the game, as provided by your pal Fragile. It’ll be a while till she lets you use it but eventually you’ll get to a part of the story where she explains that she can instantly travel vast distances and will leave her incredibly impractical looking umbrella in your private room for you to use whenever you want. With it you can instantly travel to any city or safehouse (including those built by other players) but that’s actually far less useful than it sounds as you can’t take anything with you. Your items will be left behind and can be retrieved later, but that basically means you can’t fast travel during a mission.