Theoretically, yes, but does success mean that you can write well or become a master of calligraphy? If you just want to write better and entertain yourself, it's understandable to work behind closed doors. But if there are higher requirements, I'm afraid there are still difficulties. The biggest problem behind closed doors is that it is easy to take detours and not see enough (how far you can go depends on how far you can see). Theoretically, these two problems can be engraved. The question is whether you know that you took a detour in the process of closing the door and didn't see enough.
For example, if someone has practiced European sports for ten years, his basic skills are naturally good, but other scholars are not allowed to watch it except European sports, but they don't know if they see it. You can't be everyone.