Ended up making a Hero and critical pathing it for a bit to unlock as many basic systems as possible so I can go back and do some real exploring with a better idea about how I want to spend my runes when I have the time for a more relaxed play session.
I watched part of Giant Bomb's quick look on it. One point of criticism is arguably From Software's brand of obtuseness combined with an open world structure can lead to some core game mechanics like crafting and leveling up easily getting missed for HOURS.
In practice, I think the game avoids this problem
by putting all of the basic mechanics on the critical path for like the first ~30 minutes of the game. and spelling them out to you with detailed tool tips.
Opening up the hub world is slightly more obscure than in DS3, but not horribly so, and
you can level up before that happens so I think it's fine.
More detailed instructions if anyone else just want to open all the basics up:
Just follow golden lines of grace and rest at every site of grace, some will have cutscenes. After you die to (or beat, I guess) the first story boss, rest at a site of grace again and you'll get one more cutscene unlocking one more fairly major basic system (maybe this was automatic after dying to the first story boss? I forget). You can skip most of the encounters with stealth or the horse and just open all the core mechanics up first very quickly, if anyone else wants to and/or is concerned about that.
Two tricker but in my opinion not all that tricky to unlock core systems that are right in the middle of the critical path but maybe easier to overlook.
(1) At some point after
you get the horse, go back to
the site of grace where you meet the first vendor. There will be a cutscene unlocking
spirit summons. (This happened at night for me, not sure if it needs to be at night, my guess is the cutscene forces the timeshift, rather than being triggered by it.) For me, I think this was very natural, but I can see how you could miss it.
(2) When you reach
the first big enemy camp, go down a set of stairs that are kind of but not all that hidden. You'll unlock the system that allows you to
assign ashes of war to your weapons. (Maybe you can get it other places as well, but you definitely get it here.) This would probably be the easiest to overlook of the basic systems, if this item isn't available elsewhere. Still, it's right on the critical path and rewards you for exploring the area instead of walking around it.
I think that accounts for all the new systems that were advertised and everything typically available by about this point in a From game.