Where should I create my Sling Servlets?

Hi. I have the following doubt I do not know which is the correct folder where I should create my java Servlets and Sling Servlets. I'm a little confused. I'd appreciate your help.

At the moment I have been creating the servlets here:

Link: https://i.imgur.com/L6VyOSK.png

This is a screenshot of my CRX:

Link: https://i.imgur.com/C6iRvf9.png

And this is my <build> tag in D:\myproject\core\pom.xml

Link: https://i.imgur.com/8E0LbiR.png

- What I do is place myself in "D:\my-project\core" and execute "mvn clean install" in the console

- I upload the .zip created in "D:\my-project\core\target" to AEM through the link http://localhost:4502/system/console/bundles

Greetings!