How to enable SSL on my LightSail instance ?

I have a domain at GoDaddy thats pointing to ns-352.awsdns-44.com ns-1222.awsdns-24.org ns-1908.awsdns-46.co.uk ns-887.awsdns-46.net

I created a LightSail instance and it's live on http://x.x.x.x and added the A record at Route 53 - and my-subdomain.my-domain.com also works. But now, how do I get https://my-subdomain.my-domain.com to work ?

https://i.imgur.com/Ou9HMik.png