This depends on the amount of time and dedication you put into it plus your natural ability to understand and represent the world visually. Which isn’t the same for everyone. Nature and nurture both make a difference.

In short I’ve seen most people make significant progress in the first year or two of their art journey, but after that you sort of hit a plateau. Here’s where the difficult stuff begins and it’s a life journey. Whether or not that is good enough for you and what you want to draw is only for you to decide.