I'm curious about the personal color self-diagnosis method!

Hello, Unpa members!

I am very interested in personal color, and I heard there are methods I can try at home before going for a diagnosis, so I am looking into them.
According to experts, self-diagnosis isn't 100% accurate, but it helps you get a general direction!
Also, if the accuracy is high, I’d rather spend money on buying products that suit me than on going for a personal color analysis.
Do you happen to have any self-diagnosis methods you would recommend or any highly accurate ones?
I would be grateful if you could give me lots of recommendations.
Right now, I only know that I have a feeling I might be a warm tone...
I want to know in more detail.
Spring warm tones, autumn warm tones, summer cool tones, winter cool tones... you know, things like that.
It doesn't matter if the accuracy is higher under certain lighting conditions or anything like that!

Please recommend this to me like crazy!