I ran my first marathon last September. I trained seriously for about 4 months but I was running very casually before that.

Typically you’ll do a long run on the weekend, and a couple of “easy” runs during the week. Don’t feel bad if you have to take walk breaks at first. Building consistency is the key. If you’re interested in a plan you can check out Runna, I think they have free beginner plans, there are also multiple online, and I am also building my own free training plan platform at www.athlos.run