For each potential bug you encounter, you should make a single Github Issue with enough details that someone wanting to fix the bug could understand and reproduce it on its own, using the same version, OS, etc. as you're using. Putting multiple bug reports into a single Issue makes it more difficult to find and work on any of them.
This issue sounds more like a tutorial - which is fantastic, we need more of those - but this is the wrong place to post it. There is [a wiki](https://wiki.geany.org/howtos/start) for people to post helpful tutorials like this.