You need to approach this injury in two stages: Recovery/rehab and Prevention/Strengthening. Runners overwhelmingly try to jump to the second stage when they need to spend some time in the first stage before moving to strengthening.
In the first stage, you need a "crutch" and possibly medical intervention. The crutch is a NOT a crutch, per se. It's something to take the pressure off the plantar while it is healing. For this, I'd suggest switching to a Hoka shoe, like the Bondi. The unique heel of the Hoka moved the impact point slightly forward of the heel, which reduces the pressure on your heel. I switched to Hokas when I had severe heel PF and they helped a lot.
I also found a guy that does dry needling for PF. It took three treatments to reduce the pain by about 80%. Thereafter, the Bondis were enough to get me the rest of the way.
Once you are healed... i.e., no pain when running... you can move on to strengthening. Lots of info on this online. You might also be able to go back to a more traditional shoe. I stuck with Hokas, but I use a different low heel to toe drop shoe for tempo and intervals.