So, I've finally quit messing around with everything else and finished the quest that leads to "Laid to Rest" and me being, well, me, skimmed through a majority of what it said to do then once I got the gist of it I accepted. Well, while it was accepting I caught glance saying I needed to stock up on supplies. Oops, so, what supplies am I supposed to get and from where? I tried reading the quest itself in my quest log and it doesn't say. Jinxie however keeps reminding me to stock up on supplies.

It's been a long time since I played the storyline, so I don't remember...
I think you need to keep exploring until the next event triggers...

I believe you've now opened up a new section on the map in Umbra Forest, which should be the tomb. The boss fight there should be really hard if you aren't prepared, so they tell you to stock up on supplies.

If you later can't figure the quest out and keep getting killed, this thread should help:

https://www.sylestia.com/forums/?thread=622 second page