Deeper Dive Project Wizard Tutorials

I'm working on a small little plugin (it is my first one) https://github.com/jakepurple13/Full-Multiplatform-Compose-Plugin

I want to basically extend the kotlin multiplatform compose plugin by adding everything to generate a single project with android, ios, web, and desktop. I have a good portion of the project done, but there's a few things I know I'm missing. Every time I create, I get a little pop up asking to link the gradle project.

My big question is, are there any tutorials that goes deeper in project wizard creation through plugins? I've gone through https://plugins.jetbrains.com/docs/intellij/intro-project-wizard.html a number of times and, either I'm just not absorbing the information I need, or what I need isn't listed.