Event schema, how to create it and how to add to a single page/post

Ive looked at many different events plugins and schema plugins to achieve this but all are bloated

What I want to do it to add Event Schema to a specific page/post. How would I add schema code to a page or post?

Does anyone know how I can create this code also? Is there an online tool to help me create the schema code that you have used or recommend?

thanks for your help