IF has been very helpful for me and for many others, but there is a huge variation in how different people respond to different foods.
I recommend the free 12 week introductory program at https://idmprogram.com
, Dr. Jason Fung's clinical website. It doesn't really require twelve weeks, as you immediately get access to a huge amount of information.
Depending on where you live, you might be able to find expert advice tailored to you in particular, even good medical advice.
Your work so far is impressive. Hang in there!