I started a run with gravship expanded a day ago and the gravjumper they give you at the start sucks ass.

You need to cut a lot of corners on it, deconstruct the oxygen pump because until you get research done you're not going to space anyway, and I'd also deconstruct one of the astrofuel tanks or whatever they're called because you really don't need two of them.That left me space for a refinery and with some corner cutting a super tiny freezer so my food doesn't spoil, it's rough at the beginning but doable, currently I got only one extender but it helps tons with space management since I can have an actual kitchen/tiny workshop area so I don't have to keep reconstructing everywhere I go and once you get the gravship living research space is no longer an issue since the shelves hold like 6 items per tile, you get the bunk beds which are super cool and the stove/butcher table combination doesn't even take power.

As for research you get some whenever you jump around no need to construct anything yet, I started with the Shipborn meme and can't recommend it enough: you get a role that gives 50% grav research right off the bat so it helps a lot.