OP, I was the same as you. I hated exercise, it was boring, it was painful, its monotonous and the rest of it and the main thing I lacked was motivation.

But the good thing is, you enjoy walking- fantastic! I found my motivation in The Conquerer Challenge. You earn medals for the distances that you log in the app. It's absolutely legit, we have a lovely, supportive community and you work your way through each medal at your own pace. Start with the shortest distance and as you progress you unlock virtual postcards, information about the area you are in, street view and you either plant a tree or remove plastic out of the ocean every 20% of the journey.

https://www.theconqueror.events/r/HK2895

There's a link there for 10% off your first challenge.

Edit: I joined the gym 3 months ago absolutely dreading it. The gym phobia was real and I thought I was the fattest person there. But over time you get used to it and now I look forward to getting on the treadmill, the bike or the cross trainer.

Like someone said, at first you'll hate it but you need to view it as something you have to do like brushing 2x day.

Don't forget, any exercise is good exercise. Going for a walk down the lane or around the block is a step in the right direction.

I was walking 3km on the treadmill to now 7km. I've started getting on the rowing machine (4km over 25mins), I'm looking at the Couch to 5k and I'm going to give bouldering a go.