My lack of understanding jokes

You could do some research on the nature of jokes and humour - there is plenty on the internet that will explain this to you so you can identify when it is a joke and can try to connect with the humour.

It may be you are like Sheldon Cooper who has to really work at it but with a solid understanding of the mechanics you are off to a good start,

I would start with something like https://www.scienceofpeople.com/sense-of-humor/

After that, get searching for other stuff (YouTube is a good source) and educate yourself.

You could do some research on the nature of jokes and humour - there is plenty on the internet that will explain this to you so you can identify when it is a joke and can try to connect with the humour.

It may be you are like Sheldon Cooper who has to really work at it but with a solid understanding of the mechanics you are off to a good start,

I would start with something like https://www.scienceofpeople.com/sense-of-humor/

After that, get searching for other stuff (YouTube is a good source) and educate yourself.