I didn't used to love walking, until I found a reason to.
In urban areas I looked up and started noticing things. I researched buildings, and local geography.
In rural areas, I started figuring out bird calls and breeds, started understanding the trees and flora around me.
I decided to use that time to get curious. And now, I love walking.
If you think "sure, I have this rough goal of exercising more, but it sure as heck bores me", deciding to focus on the goal just means every time you fail at doing more exercise you a) are just as far away as you were before and b) are now blaming yourself for not being disciplined enough.
How about you choose some inputs that you know roughly align to that goal, but you choose inputs that you can get motivated by?
Perhaps going to the gym bores you, so fine, don't go. Perhaps your exercise is playing sport, or swimming, or walking and exploring the World around you, or perhaps it's just getting a standing desk. Just pick something and try and it, and then if it doesn't work, think about why and what to change and try something else.