Thanks for the comments everyone!
Things have been...rocky so far. I had a tutorial I planned on using to get started because it went from scratch instead of having you get assets off the store and included a wall jump, but it was hard to follow, and ended up with the raycasting being all weird and the player sticking to things. The guy "left those problems for you to figure out" which was, shall we say, not a great thing to find out after spending a couple hours following along to end up with a janky broken movement system. Never could get the wall jump to work, at that.
Also, as I mentioned on the discord, I just found out at the start of the weekend that the storage unit my fiancée and I have flooded last week and I had to spend hours over the last couple days emptying it and trying to save what I could. So that was a nice addition to the jam starting. But anyway, a couple more scrapped project files of experimentation later I got some help from the lovely people on the discord and found some better tutorials and I'm about to dig in again.
In my most recently scrapped file I did eventually get side to side movement, variable height jumping, and even a halfway functioning wall jump I made myself by adjusting the ground checking for the regular jump to work sideways. I also got a gif screen capturing dealy so once I get a more solid start on a project file I can stick with I can start sharing some pictures! Though as my plan above shows I'm not planning anything but placeholder art for a while still.
Hope everyone else's projects are going better than mine!