Activity for Marsha

Hello everyone. My FH and I got engaged in September 2017. We decided to wait until Dec. 2019 for our wedding. Is it too late to have an engagement party? When is it too late? And who do I invite?

I was wondering how long or when to have our wedding shower and engagement party ? I'm very new at these kinds of things and have no idea where on the time line I should have them?