Hi Kirill. What a long story, nice to read. Thanks. As a man, who've building a product for 6 years, I understand you well. Keep pushing yourself. As @Shindi

Hi Kirill. What a long story, nice to read. Thanks. As a man, who've building a product for 6 years, I understand you well. Keep pushing yourself. As @Shindi said, it is important to start from potential customers and their needs first.