This link shows a variety of stretches including the Pigeon stretch. There’s something in here to suit all of us.
If you’d like more information especially on Pigeon stretch please have a look on YouTube – there’s loads of demo’s and quite a few variations in approach, but again something for everyone depending on flexibility and restrictions.
My advice would be to trawl through them and find one that suits your personal ability. Above all don’t work into discomfort!