Help understanding Peter easy vest pattern

[Ivy]

I am planning to knit a men's vest using this pattern.
This is my first big and I want to make sure I understand the pattern correctly.

Back:

End on RS
Does it mean should I stop after knitting the right side or after knitting the wrong side row? If I am doing stockinette stitch, should I stop after the knit row or the purl row?

Change to larger needles
Should I slip the stitches from one needle to another knitwise or purlwise?

dec 20(20-22-22-24) sts evenly spaced across – 82(90-100-108-118) sts

I do k2tog after every 5 stitch?

Shaping armholes:

Bind off 6(6-7-8-9) sts at beg of the next 2 rows – 70(78-86-92-100) sts

Why only beginning of rows? Won't this make the piece asymmetric?

Dec 1 st each side every RS row 8(10-11-12-14) times – 54(58-64-68-72) sts
I decrement only on RS and not WS?

Trouble starts when I come to Front. I just don't understand what I am supposed to do.

Shape Armholes and V-Neck: Next Row (RS): Bind off 6(6-7-8-9) sts, work until there are 34(38-42-45-49) sts on RH needle, sl center 2 sts onto holder, join another ball of yarn and k to end. Work both sides at once.

As the pattern continues, it becomes all the more complicated. Is there a tutorial which I can use?