Most likely, if you were at the point of graduating from this system, you probably wouldn't go into another system just because of a difficult earth life or many here previously.
I have some experience with the above, but don't remember too much consciously. All I know, is that I had a couple of inphysical selves get to translate out of this system of physical data stream, and hang out in others. More physically or metaphorically, they got to go on a spaceship with some pretty intune non human beings, didn't come back to earth, and they learned how to phase their "physical" energies into "nonphysical" and back. Entering, leaving, coming back from different data streams I guess some here might label it.
Then, I also had a couple of selves who "died" and nonphysically got refocused in other systems for a bit (like the one connected to the Star Arcturus), but we/i came back here because of service impulses, and perhaps a sense of loyalty to the cause here.
Regarding what other systems are like, from little I do remember or have experienced, one there is a great variety of different expression and many, many different systems, and two, in at least more expanded/evolved systems it can just be described as much more harmonious than the Earth system. When I was little, I use to have dreams of being on a spaceship, traveling vast distances and coming back to Earth and the mood was very purposeful and intent, like I was on a mission of some kind.
Ultimately, it doesn't seem to matter too much where you are or where you go, it's all, fundamentally, about love and service, and this system is a great one to practice choosing and attuning to love. For me, other systems have been almost like a vacation or rest, similar to how many feel when they "die" and fully focus in the nonphysical that's still connected to the Earth system. Nice, rejuvenating but ultimately a bit boring. Ok, a bit more interesting because of how many different kinds and types of consciousnesses you become aware of.
But since things are in the process of getting cleaned up here in the more long term and stable sense (finally!), I feel and have been told in various ways that I can move on from here more permanently and not feel such a draw to come back in this manner at all anymore Yet, since my wife and Twin Soul will still be here for another human lifetime or two, and there is a difficult war coming in a few hundred years or so, apparently I will make some brief non human appearances temporarily (according to one of her dreams wherein she recognized an "E.T." to be me, in a future life of hers).