The road to becoming a successful self-published author can be a long one. There may be a lot of ups and downs, kudos and criticisms, proud moments and embarrassing failures along the way. It's important to keep your eye on the goal and not be dissuaded by setbacks or diverted by accolades. It's also essential to have a clear purpose in mind about why you decided to take this journey in the first place.
Most successful writers work hard for years to achieve a measure of success, and those who are in the game looking to "get rich quick" are likely going to drop out long before the rewards come.
In the beginning, writing itself must be its own reward. It's a labor of love at this stage, and there are no guarantees. But the longer you persist, the better the odds, because you will be honing your craft, experimenting with new approaches and creating a network of supporters.
Write down your purpose, the reason you are doing this. Put it somewhere you can see it often. It will strengthen your resolve and deepen your commitment. It will help you find joy in the journey and give you a reason to keep moving forward even when a part of you feels like giving up.