monkey-source VS intellij-platform-plugin-template

In the previous article, I showed the process of creating a framework for a language plugin. Well-known plugins for Java, go, Frege were used as examples. There are also examples from the plugin for the Monkey language, which I developed while I was figuring out how everything works. Since my goal was not to cover everything, the plugin covers a limited subset of the language. The interpreter for Monkey can be found here.

I am working as a backend-developer, and sometimes I am tired of work routine. Deeping into some opensource helps me and I really keen on Jetbrains' product and IDEA. IDEA can be customized with plugins, which you can write yourself. The most part of IDEA's code is open-source. Developers from Jetbrains always help you to make pull request and improve your main tool. I already have the article about how to write a small plugin with one inspection. But if you want to understand how IDEA works, you should try to write a language plugin. Let's do this. As a "guinea pig" we will take the simple language - Monkey, the interpreter and compiler for it is described in the books on Golang. Since my goal was not to cover everything, the plugin covers some limited subset of this language. The interpreter can be found here.

I'm a beginner in plugin development and want to develop a simple plugin to access Redis in Intellij. I forked an official repository from JetBrains containing a basic template for plugin development. I can understand how to use the Service to call some business logic and share it between the plugin's components. But I really curious about how to build a simple UI using Kotlin DSL UI. Could you guys share some useful links or repositories describing the flow of creating elements/components for the plugin? The documentation from JetBrains is excellent but it doesn't contain any proper examples for creating UI elements.

The easiest way to create a new plugin is using the template. It is being actively developing and had already included most needed features.

Now we have a great template , which contains a useful todo list

I am using the plugin project template found here (https://github.com/JetBrains/intellij-platform-plugin-template)

I've cloned the JetBrains/intellij-platform-plugin-template plugin and gotten it to build correctly, but now I'm having trouble figuring out where to go next. Can someone help point me in the right direction?