Everyone has these doubts, but if you want to learn to draw you need to put them away. There is no guarantee that you will learn drawing, because many people who set out on the path never end up making it. The success rate is really really low. I've seen artists drag on for 10 years plus, never improving, even though they take classes from Vilppu, Brainstorm, CDA, listening to all the pros. When you are in this business long enough, you begin to see how incompetent most people are. And unfortunately, you are right now in that class of incompetent people.
But if you have the drive to think critically and overcome your negative attitude, then you can learn to draw. Countless anons have done it, and you can do it too.
My advice is to follow this guide: https://davidfinchart.com/where-to-start-and-where-to-go-from-there-a-roadmap-to-professional-quality-art/
Do it with real effort, and you'll improve. I think you should jump into figure drawing straight away, because animals, landscapes, etc are all too easy. Many landscape painters never learn to draw the figure because they get stuck. Start figure drawing, and watch yourself grow.