Good morning
@Kerrie , and welcome to the forum (to be sure, to be sure)
This poor old tree is suffering a disease I know a fair bit about - it`s called old age
You are quite right about the major pruning in my opinion, and I found a good link to help with that here
https://www.gardenfocused.co.uk/fruitarticles/pears/prune.php
Do you have squirrels in your garden? The tree shows a lot of lichen - which is no problem, but it all looks pretty sound to me.
I can see a few good fruiting spurs on there, and as the tree is approaching the dormant period - from November through to spring it is a very good time to get those secateurs sharpened up.