The simplest start for me was walking. Find somewhere appealing like a park/trail and do what you can at first. I found mornings the least likely to be interrup

The simplest start for me was walking. Find somewhere appealing like a park/trail and do what you can at first. I found mornings the least likely to be interrupted by other life events. Once you feel like the time it takes is more of a limit than the energy, find something that's more energy demanding. For me that was cycling. As everyone says, consistency is one of the key things to keeping the habit. I made it a M-F thing, with weekend rest days. The other aspect is obviously diet but that is harder to suggest without knowing more about you/your lifestyle/etc. I do think food is an easier one habit wise: if you treat yourself (or slip, however you see it) one day, I think it's easier to get back into healthier foods the following day (unless you buy everything the day you eat it?) Anyway good luck, it's definitely worth the work.