First, you need to know what species of pine this tree is. Pines fall into several care categories. Double flush in long growing season pines. Single flush 2 needle pines, Single flush 5 needle pines. And the separate category for collected pines with trunks over 75 or 100 years old. Each group requires a different pattern of care.
If this tree were mine, I would do zero pruning until one year after repotting. This tree looks like it needs to be repotted. Depending on your location, you may, or may not be able to repot this year. Otherwise you might have to wait until spring 2021. Do no pruning until at least one year after repotting. So if you repot spring 2021, no pruning until the appropriate time in 2022.
This is a neglected tree, the roots need work. It does look reasonably healthy, but not vigorous. If you do "too much, too soon", it will not survive.