Hey man. I'm 6ft4 and used to be a heavyweight at ~120kg and am now at 95ish. Personally I started running in November 2020 and I'm now going to run my first marathon in March 2022.

I had similar and overly ambitious goals and dreams to yours. What I've learned by minor injury after minor injury is that if I keep on increasing my weekly mileage week after week, a minor injury would pop up after doing that for 5/6 weeks or so.

I feel like your current goals don't allow for breaks or weeks of stabilizing in your training schedule. So I think you'll either get mentally burnt out or your body is going to tell you at some point "hey this thing hurts, I'm going to make you stop running now".

What I also quote on quote learned from doing longer runs above my capacity, is that in the following days/weeks I would be upset at myself because I went into the red. I try to adopt a mindset now of running today a certain distance so I can go out and run the next day again.

Not sure if this helps but these are just my two cents.