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This won't be a quick process for a first time DIYer.
First you've got to remove the old deck. You have to be careful around the pool so you don't destroy the coping or drop large sharp chunks of concrete into the pool! You'll also want to minimize the amount of dust and small bits of crete that enter the pool.
I'll assume you don't want to pour any concrete for the deck, so you'll need to procure enough flat (not concrete receiving coping) to go around the pool and ~ 1/4 of that will need to be the notched/ bendable style to go around the end radii, but then you need to properly cantilever the deck (if you have or will be getting a safety cover, you need at least 3' of concrete decking around the pool!)
The anchors for the ladder/ handrails need to be encased in concrete (a 2 X2' X 4" pad should be enough) and bonded to the pool. You can make them a sub-slab and paver over them or just have exposed sections of concrete at the ladder/ handrails.
One of the hardest things is going to be making sure that you get the correct receiver for your liner (there are 3 different types and I can't think of any way for you to know which one will take your liner - unless you have the papers from when you replaced the liner 2 years ago).
To replace the coping:
Once the existing deck is out, you'd pull the liner out of the receiver, take out the old coping and install the new coping, section by section, putting the liner back in to the new section before proceeding to the replacement of the next. (there are a couple tricks that can make this easier 1) lower the pool water 2) use duct tape to keep the liner from sagging into the pool)
The purpose of this is to give you some idea of the work involved - if you go to do this, PLEASE ask us for guidance before doing any part of it!
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