How to improve my fitness

I'm pretty unfit now and, to be quite honest, I don't exercise much other than walking. I want to change this.
I put on a lot of weight a few years ago due to medication I am taking, but I've now lost most of it.
What's the best way to improve my general fitness, preferably without giving myself a heart attack...?
Thanks.

That's fantastic about your weight loss!🙌 Swimming or yoga are great ideas to get moving in a low-impact way. They're a fun way to build some fitness without pushing yourself too hard. Speaking of building fitness, have you ever thought about talking to a trainer? They can give you a personalized plan to reach your goals. Also, I was just curious – did medications like Wegovy injections play a role in your success?🤔

I'm pretty unfit now and, to be quite honest, I don't exercise much other than walking. I want to change this.
I put on a lot of weight a few years ago due to medication I am taking, but I've now lost most of it.
What's the best way to improve my general fitness, preferably without giving myself a heart attack...?
Thanks.

That's fantastic about your weight loss!🙌 Swimming or yoga are great ideas to get moving in a low-impact way. They're a fun way to build some fitness without pushing yourself too hard. Speaking of building fitness, have you ever thought about talking to a trainer? They can give you a personalized plan to reach your goals. Also, I was just curious – did medications like Wegovy injections play a role in your success?🤔

The key to weight loss is diet. Specifically being in a calorie deficit.
Good starting point is here: https://www.nhs.uk/better-health/lose-weight/
As for fitness. What do you want to do? Improve your cardiovascular fitness? Get strong? Learn to back flip?
Couch to 5k is something that has worked for many people. There are probably plenty of sports teams near you that will welcome beginners. If you want to get in the gym, I have a wealth of resources than can help.
You just need to start small and build your way up. The best general advice I can give is find something you enjoy because that will be the thing you'll stick at.

Doing another sports to make your persistance better. Better persistance means better fitness. It was already named, but swimming is a good thing for fitness.

I'm pretty unfit now and, to be quite honest, I don't exercise much other than walking. I want to change this.
I put on a lot of weight a few years ago due to medication I am taking, but I've now lost most of it.
What's the best way to improve my general fitness, preferably without giving myself a heart attack...?
Thanks.