What's the best way to ease getting back in shape after years of little to no exercise?

I’ve been thinking of just walking around tracks or trails but the weather over here has been cool with the wind and all. I don’t like gyms too much as there can be a lot of people there. I’ve gotten so lazy and uninterested in exercising since Covid. I eat healthy mostly except for ice cream most of the week. Haven’t worked in like a year so stay home a lot and bored af. Idk I just haven’t been myself since getting overweight and not exercising in some capacity. I have anxiety and depression as well so that factors in too. I only get motivated to make some changes when I get high at night and say I’m going to start doing things tomorrow. Once I’m sober I lack the motivation to do anything