Getting a little closer to a squat is better than forcing your body into a position the tissues are not ready for. A small increase in loading helps your tissues adapt without stress.
The key is to stabilise, mobilise and strengthen your whole body, from top to toe. Start small. Flex your hips and knees a little more than what they are used to. Sit on a pile of blankets or a stool to peel your vegetables, play a board game or drink your favourite beverage.
If this is too much for now, simply sit on the front edge of your chair and let your muscles participate in holding you upright. That would be a great start!
When outside, find a hill and start the movement facing down.
You don't have to stay in this position for long. Start with just a few seconds. Listen to your body.