Hi Yvonne. Others have made brilliant points so I won't repeat what they've said. There's some really helpful advice on synopsis writing on JW https://jerichowriters.com/synopsis/

And if you're a member, your can download a synopsis builder that gives you point by point guidance - they say it's about getting your structure in place then filling some emotional responses in afterwards.

This is definitely one of the toughest things to do - I've just had to write one myself and they're painful! Keep at it, you'll get them