It's like cars… someone has to all the things before you can use it… and then the things like finding gas in the dirt for said car… aye caramba!
Step 1: Don't start below 5D if you'd like to return to your starting timeline.
Thought I guess that's kind of creating a parallel timelilne with the one you're jumping to where you assume the physical form of the you in that timeline, if you're trying to experience it instead of simply watching you do it.
Still don't wanna start below 5D, tho.
All you'd be doing is creating branches if you can get out far enough out.
One for where you never left the timeline.
One for where you left the timeline and never came back.
One for when you left and it seems like you never left.
And one for every arrangement of you coming back to the timeline at every other point or not.
Ffffffractal time.