Content warning: ED discussion/mention, discussion of body image

Basically some of my family have had EDs at present or past. I am not overweight however I am steadily gaining weight from a sedentary lifestyle and a consistent highly processed and high sugar diet. It's not even the fact I can't fit a certain pair of pants that is bothering me, it's how doughy and weak I feel. I have never been an athlete but I used to have some small bicep and calf definition just from what I did in my life. And now I've been doing a lot of reading about how much eating matters. I crave to eat more healthily, I really want to try and track macros or something but I'm not really sure how to approach eating healthier without overanalyzing it to a nasty degree? I have this weird irrational fear that I'll develop an ED as well just by having weird thinking about not eating certain sweets or snacks. What I really need is some f'ing vegetables.

How do you approach a new way of eating without buying into diet culture rhetoric and how do you push yourself into actually following a healthy pattern of eating without getting unhealthy thoughts? I really don't know much about EDs but I know that I'm not fat. I don't want to describe too much about my body but I was underweight according to the bmi until the last few years (even though I know bmi means nothing. I just have a small frame and so does everyone else in my family). And it's really only the last year where I realize, I was basically completely sedentary and ate junk the entirety of 2021 and thought it was fine because I'm young or "I eat like this at Christmas and it's fine, so it's fine to eat like this year round." I know that rationale is dangerous.

I know I can't be the only one who became a sedentary shut-in during the pandemic but I just want to figure out how to reverse that without somehow inducing an ED. Maybe that is not even possible to do but I feel like it is.

Thanks for reading

edit to add: in case it wasn't clear I'm worried I may have a yet unseen genetic predisposition to EDs, but I don't even know if that's a thing either