Heading back to the gym after a decade away. Please help...

Just an update: I've now finished my first two-week set of 15's. By the time I got to my sixth workout (ie, 15RM Day) most of my 15RMs were about 20% higher than what I had originally projected when I took a week to "test" for my RM's prior to starting the whole eight-week routine in earnest. I'm going to have to re-figure my 10RM and 5RM before I begin those two-week sets. It's a good problem to have, I suppose. I hope that this pace of strength gains keeps up.