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:

1. You will get hurt. You will injure yourself. If you think you won't you definitely will, and you will have to take rest because of it. It might set you back days or weeks. But it's better to rest.
2. You actually make gains to muscle and strength on your days off. When the muscles repair and grow back. Because of this - most of the pages on the fitness subreddits will have a 3-4 days a week routine with rest days in between. Rest days are important.