Japanese pen pals

Getting a Japanese pal was something I really wanted to get because last year I was helping a Chinese girl located in China with her english via email. And I really enjoyed that and wanted to get a Japanese pen pal that would help me with my Japanese. Thanks to a you tuber that recommended this website in which you can find pen pals from all over the world and you can specify age or gender but I only narrowed it down to the country. This is the website:
www.japan-guide.com
 Although I have sent out over messages to 15 people I only got a few replies and then even less re-replies from those people until I had only 2 pen pals Mao Mao and Sasaki a girl and a boy both 15 years old.