Roaring lion - [Improving my drawing]

Hi all!
I am a beginner artist. I have been drawing for a while. Not a very good artist yet but trying to do something good and present something good among you. I was encouraged to draw with the first pen after seeing @maxwellmarcusart drawing. He is a very good pen artist. At first when I saw his drawing and wondered how he was so perfect with inverted spots and I was amazed. I thought maybe it is very easy and takes less time but it is not like that, it requires patience. And if you make a mistake while drawing with a pen, there is no chance to correct it because the stain of the pen can be erased with an eraser. However, I have not yet become a good artist like Maxwell or them. But I hope I get good results if I draw regularly.

Below are some shots of today's drawing process: