Youtube is a great resource for almost anything. I run so my stretches are based a lot on that, and doing a quick yoga routine is also a great way to get a full body stretch
There is a great resource that you can buy as a digital download. It’s a book called “Foundation” by Eric Goodman. It’s an amazing posture improving workout.
I found various streaming subscriptions to be very helpful. I think the most helpful was Gaia oh, and I have found some things on Amazon Prime as well.