The first coat of spackle is on. I used almost an entire gallon of joint compound, just for the this first coat!
Since the first coat generally needs to be thicker, I applied the spackle using the “cake frosting” technique, which is a technique that I made up, because I am terrible at spackling. I apply the joint compound very thickly, sometimes with my fingers, and though I try to smooth it, it generally ends up looking like I have frosted a particularly decadent cake. I then rely on sanding to smooth the finish properly before the next coat.
For the the corners, I applied a coat of joint compound, then embedded paper seam tape in the spackle. Then, I applied another coat of spackle over the top of the tape, sealing the seam.
I will let the whole thing dry overnight and then sand it down tomorrow. Hopefully, I will be able to apply the second coat tomorrow afternoon, assuming that I am not too exhausted from sanding!