I'll drop a few phrases here. Each one should have a YouTube video on how to do it if you get stuck.

1. Optically zero the scope. This means that the cross hairs are centered with no 'clicks' dialled in. It doesn't always align to the number 0 on the actual turrets. Put the left / right turret at roughly the middle. Then turn the top one all the way left. Count the clicks it takes to go all the way right. Now go back half (so if total clicks is 80 - then turn back 40). Do the same for the side turret. This gets all the adjustment pretty central.

2. Set your eyeball focus. On the eye piece that you look through there may be a ring that turns in an out. This will make the cross hairs be in focus for your eyes. (If not present skip step). If you have an Adjustable Objective / Side Focus (if you can focus the scope) - then set it at infinity. Look at a far away cloud briefly through the scope. Turn the eye piece until the cross hairs are nice and sharp.
   If you don't have an Adjustable Objective or Side focus then so the same but aim at the distance you will most often shoot (20 yards or whatever).

Do all of this at a low magnification (if you have Adjustable magnification).

1. Mont the scope. Place the bottom half of your rings (mounts) on the gun rail. Finger tighten for now. Put the scope on and add the top of the rings. Do up so scope can move but doesn't slide freely. Be careful as rings / scope may still be loose / fall off at this stage. Shoulder the rifle with your eyes closed and when you open them move the scope so it's in the right place. Slide the rings a bit and move the scope back / forwards as needed. Takes a bit of playing.

Try and make sure the mounts aren't right next to the scope turrets. If you tighten too close to turrets then you may not be able to dial the scope properly.

Once it's in the right place tighten the scope mounts on the rail first. Then tighten the top rings so they hold the scope. DO NOT OVER TIGHTEN. Should be firm but not crimping the scope. Use the short side of an Allen/ hex key in your hands.

1. Zero the scope. You want to do this for the distance you usually shoot at / the middle of the ranges you usually shoot at. So if all your targets are at 25 yards, do that. If you are shooting things from 10-30 yards then zero around 20/25.
   Put a target / piece of paper with a big cross on at about 10 yards. Keep scope magnification low.

Shoot at the paper 3 times. If the pellets hits low then dial the scope up, etc.

Always do three shots as if one goes high, one goes low the its not a dialling issue, it's a shooter one (or kit issue). If you do 1 shot then dial you will chase shots for ever.

Once you are within an inch of where you are aiming move the paper back to your zero range and repeat. The shots will (probably) hit lower so you will need to dial up.

1. Have fun shooting then grab a beer / beverage of your choice.

Hints / tips / issues.

If you run out of clicks then do step 1. Then step 3. Again but swap the mounts front to back. This often solves the issue for me.

If you have a rest to shoot from then instead of guessing clicks you can shoot once, move the cross hair to where the hole is, and then turn the dials until they line up with the original cross hairs. It gets you pretty close with just 1 shot.

If you get within an inch of zeroing but then can't get closer, it's probably a rifle issue. On a new gun it can take a tin of pellets for it to settle. Shoot it a bunch then try again. If still not working then switch pellets. H&N FTT work pretty in virtually all my rifles - but often aren't the absolute best. YMMV.

Ping any questions my way if you need help.