Looking to get into fishing this year (never really been) and want to start on trout. From what I read a Carolina rig with powerbait is the place to start.

Berkley® FireLine® Crystal Fishing Line for Main Line (6lb)
Berkley® Vanish Fluorocarbon Fishing Line for Leader (4lb)
Eagle Claw Lazer Sharp® L038 Salmon Egg Hooks (Size 10)
Cabela's Barrel Swivels (Size 20)
Cabela's Round Glass Beads (4mm)
Cabela's Bullet Weights 190-Piece Lead-Free Weight Assortment
Berkley® PowerBait® Natural Scent Trout Dough (Corn)
Berkley® PowerBait® Original Trout Dough (Pink / Chartreuse)
Berkley® PowerBait® Floating Mice Tails ( Bubblegum/White Tail & White / Bubblegum tail)

For when I want to use spinners:
Cabela's Barrel Snap Swivels (Size 20)
Panther Martin® Deadly 6-Pack for Trout

This all seem right?

unless you need the extra noise from a clacker or beads, I wouldn't bother with swivels or beads for your everyday carolina rig.

My carolina rig is a bobber stopper above and below a tungsten weight. It cuts down on stuff necessary to rig the carolina rig and it makes it adjustable. The added benefit is if I decide to change over to a texas rig, it's just a matter of moving the weight and bobber stopper down to the hook.

Bobber Stoppers: https://cdn3.volusion.com/9j7vu.jw4f2/v/vspfiles/photos/EagleClaw-BobberStop-2.jpg?1517499800

I'm in the Deep south, so couldn't offer any advice for Maine. I'm quite sure there may be plenty of Youtube fishing channels that cover your region.

Just use your line no need for leader.

Most any lightweight spinning reel combo with light line will work for just starting out.  No need to get too advanced with a lot of useless stuff you don't need.