Hi, this website has simplified Mandarim Chinese, I also use Duolingo to learn new words every day and review the words I have learned, you can use both 2, with 1 to 2 hours a day you can have an enough knowledge to read a few news or stories in 1 to 2 years, based on my experience. Good luck!
Is simplified mandarim the one you are learning, like me? Or traditional, cantonese or something else?