What plane are you thinking of getting? IMHO the most useful is a low
angle block plane, followed by a shoulder plane, a scraper plane, and a
#3/
#4 smoother and a #5 jack.

I was gonna get a #4, then I was gonna get a standard block plane. That was
my original plan. But based on the amount of reading I've been doing, the
low-angle/shoulder planes makes sense to buy first. But I will not have a
joiner or a planer, so I was going to use hand planes to smooth all of my
rough sawn wood. That's why the #4 was first on the list.