Consider couch to 5k. It's a good basic place to start.
Expect at least 2 months before you are feeling fit. You get to feel progress in the sense of "could run a bit further today" each new run. the two most important things:
FYI, my current plan is 3 days a week of bodyweight exercises (working up to /r/bodyweight's recommended routine), and 3 days a week of jogging starting with a pre-C25k program. How well that plan succeeds, well, we'll just have to see. :)
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