For me, the biggest barrier to getting started on something is all the boilerplate and ceremony around actually doing the thing. Right now, I can go from a resting state in bed to sitting on my rower or running outside within 90 seconds. The same cannot be said for most other physical hobbies.
I rationalize it along lines of "If I start right this second, I can be done with cardio before 8am". For me, the time cost is way more painful than any physical cost. This ideology allows me to squeeze exercise into time windows that would otherwise be impossible if I had to travel somewhere or meet other people to engage in the activity.
Ultimately, I feel that physical fitness is about recognizing the benefits and engaging them at any cost until you are at a point where the cost becomes relatively negligible. The physical and emotional aversion are a temporary thing, and it will ultimately boil down to how much time you want to spend on your own health.
But now that gyms are closed (I wouldn't go if they were open anyway), I don't have a good substitute. And bodyweight exercises take significantly longer to get the same "pump".
At the gym, I'm forced to get through the workout. At home, it's so easy to hop on the laptop during breaks between sets and get distracted.
It will if you walk up hills.
Even walking a few miles a day in flat areas is still good exercise; getting yourself outside and moving is a very good start.
I think walking to work or class is also good for thinking and getting your brain working.
Walking/hiking in nature is also great if you are near a trail of some sort.
I only really enjoy swimming - but it's too much work to prepare yourself for the pool - and carrying things - the other day me and a few frineds helped my other friend move ten station wagons worth of stuff - but that isn't a particularly healthy activity.