Don't know how to start learning Chinese by yourself?
Here is a simple but useful framework that will help you to get started in a right way!
1) Purchase books published by Peking University Press and start learning Chinese by using those books.
2) Create "Winner Effect" in your brain by studying consistently for 20-30 minutes a day and transition into 1-2 hours a day after a few weeks.
3) Don't procrastinate on REAL learning by using apps and watching movies. Those are really good ways to expose yourself and create an interest in learning Chinese, but it doesn't count as studying time. You can use apps and watch movies but focus on learning with textbooks first.
Ultimately, you should invest in a Chinese course or a Chinese coaching program to accelerate your Chinese learning. But it's really important that you do regular and consistent self-studying.