Running is a highly repetitive task and it will amplify any biomechanical issues you have.
In the first phase of my running career, I used to struggle with achilles tendon problems, nothing any shoe or podiatrist or orthopedist was able to properly diagnose or fix.
Eventually I saw a PT. The PT clued me in that I had a weak core and bad biomechanics. To use an analogy: I was like a car with an out of alignment suspension. And I had been trying to fix it by changing the tires. When what I needed to do was fix the suspension. The suspension is everything above your feet, but in particular your hips and core. And mine were in terrible shape from years of sitting before I started running in my late twenties.
So I had to re-invent myself as a runner.
Originally I started with the exercises the PT gave me for my hips and core. I got rid of my motion-control shoes and my prescription orthopedic inserts. I switched to just a basic cushioned shoe. Shoes are like unsprung mass on a vehicle. I didn't want any more weight on my feet than I absolutely needed, especially since I wear size 11-12 shoes.
I started to pay attention to and work on my form. I found the PT exercises boring so I ended up joining a Crossfit gym for a couple years which worked for me, but I don't recommend Crossfit as generic advice since Crossfit gym and coach quality varies widely. But it worked for me.
With my form and strength in better shape, it enabled me to start putting in more mileage. Whereas previously I couldn't run more than 35 miles/week w/o risking injury, I was now able to comfortably run 65-75 miles/week. That allowed me to take on the types of training routines that I needed to achieve some of my time and distance goals.
Now, I know some folks who never cross train and don't get injured and maybe they just naturally have good form.
But for me it was something I had to work at. And the best kind of professional I know for advising you on this is a PT who is themselves a runner and works with runners.
The image I keep in mind when I'm thinking about running form is Mo Farah's:
https://www3.pictures.zimbio.com/gi/14th+IAAF+World+Athletic...
https://www.youtube.com/watch?v=uxf1gEkm_EE
Here's some of the exercises he does to have and maintain that form:
https://www.youtube.com/watch?v=Zx2i6TKMi1A
And for comparison, here's Ed Whitlock in his 80s:
https://mindmotionmatter.files.wordpress.com/2011/09/ed-runn...