Talking to myself, making fun of myself, convincing myself. Is that okay?

Sorry for the strange question.
But this is a rhetorical question.
And it's been bothering me for a long time.
 
I often talk to myself to convince myself that I am okay and to make myself laugh.
People around me don't take this well and point out to me that it probably requires psychiatric treatment.
It has probably gotten stronger in recent years.
 
But I have 2 questions about this.
1. Many people sing to themselves, hum to themselves, and thus make their time and life enjoyable. Who determined that singing is okay and speaking, convincing, explaining, summarizing, or making myself laugh is wrong?
2. I am a bit of an exception in the abundance of profound wisdom and education that the Creator has bestowed upon me (and I am underestimating because I will be content with a little praise in front of you so that I do not lose my honor. You excel in humility, which I also excel in, seriously!)
And the abundance of wisdom (and the few who are interested in hearing it) requires me to sort my thoughts, to organize them like a proverb on its wheels, and thus it helps me think and reach conclusions.
Who determined and why is this wrong? Because it's unusual? So what I'm going into depth and not superficially and this requires in-depth learning and organizing thoughts.
 
If the rabbi has 2 answers or even just 1 I really want it.
 
With great appreciation
The humble wise man who talks to himself and makes himself laugh