i have exactly the same feelings/experiences. i started to ride a bike when pandemic begun and it really improved my comfort of living and ovearll "mental" attitude. its really not about fitness but more like a therapy for a brain to reset. its best to ridea in areas where you can be close to the nature as the presence of nature also contributes
If you are running or cycling it is VERY important to stretch extensively afterward. Perfectly "healthy" and trim cyclists and runners can end up with back problems that lead to all sorts of health problems because they have not stretched the legs and core regulalry. Ham strings tighten up like steel cords and can ruin your back...especially if you sit for significant periods of time each day. I have learned this the hard way.
