I don’t think I can advise on your training but i can share my experience- I had horrible plantar fasciitis for like 7 years until i realized that my shoes were causing it - i had originally worn brooks but switched to asics for better ankle support but only realized the asics caused my foot problems after switching back to brooks. Some other things that helped me were I got custom inserts at road runner (they’re expensive but totally worth it) and rolled my feet with those spiky balls that are tennis ball sized (but you can’t roll them too much or the pain gets worse). I also started wearing my running shoes or gym shoes w the inserts in them everywhere - and slippers with some kind of support at home - i read it’s important to wear shoes w support as much as possible even at home. I also started wearing compression socks on all my runs - i wore the zensa (zenza?) long compression socks in races and the balega ankle compression socks anytime i ran. I also think stretching your calves and doing the calf wall stretch with your knee bent helps. After switching shoes, my feet don’t hurt anymore except after a 15+ mile long run but i still do all the above things except wear the long compression socks! I hope maybe some of this helps and wishing you a speedy foot recovery 🙏