I just joined this community and posted my very first question. But after some few minutes, I realised it's been on hold. Is there anything I said that was inappropriate?
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The only real problem is you misunderstand what Stack Overflow is about.
It is not a general free-for-all forum where any questions related to programming are welcome.
It is a Question & Answers site where you ask specific questions and get specific answers. Beginner questions are absolutely welcome, but the problem is you didn't ask a question.
Your title says it all:
Source of inspiration for beginning programmers (Java & C#)
This is not a specific question. You are seeking out opinions & advice from everyone and those questions are not in the scope of Stack Overflow. To help guide you in how to ask an on-topic question, you should check out What topics can I ask about here? and What types of questions should I avoid asking? from the help center.
It is going to be difficult to turn this into an on-topic question, however, because you really don't have a specific question in there. If you were to go get yourself a good C# book1 and while reading and working through the exercises you find something that is unclear, then you can ask a specific question about that specific problem.
Then later as you start writing your first program, if you encounter issues there, you can show a small except of the code that is causing you problems (and can reproduce the problem) and get help with it.
1 - As Ken correctly points out in the comments a questions asking for a good C# book or any similar reference is off topic as well.