About 10myears ago when I was working on my masters degree, a guy named Berne Heinrich came to the university to give a speech.
Berne Heinrich has a phd in biology and is a very accomplished runner tonthentune of a 2:22 marathon and a one time record holder for the masters 50'mile and 100k road race. The dude is a legit badass.
Anyways I was coming off a season of ironman triathlons and 50 mile trail runs and this old dude (Berne Heinrich) is asking where the good running in town is.
We ran about 4 km on the trails on he aluvial fans of the footnhillsnin Albuquerque. Berms Heinrich dedicated a huge part of his career to explaining and describing why and how people run and what we can learn from animals. Subsistsnce hunting isn't a thing for this guy but persistence hunting is.
When he gave his talk at the university so many questions were being asked but people wanted to know "how can I runnan uktra marathon?"
He gave a few simple rules to go by and he always referee back to it as the rule of 3.
Before you worry about distance speed, races, anything, finish he rule of 3.
3 times a week, 30'minutes, 3 months. After that worry about your running.
If you havnt put in 3 months of base work you have no business worrying about anything other than building the base (habit). After that's done then you can start thinking about intervals and hill sprints, tempos and long runs.
Until then, 30 mins, 3x a week for 3 months.
There's going to be lots of "coaches" on the internet telling you stupid shit. Stick to the rule of 3 and then check back.
And google Bernd Heinrich the conversations I got to have with that guy...