How to remove the extra outline?

Question

Adobe Illustrator

Hello, how to cut the letter D so that there is no white line in the middle? Moreover, one part of the letter D is in the foreground, and the other in the background.

Answer 1

I can recommend a good illustrator teacher - @art.em.po (insta)
he has his own course, there is a lot of information there - it will be useful for both a beginner and a working master.
If interested, here is the link:
https://artempo.tilda.ws/ai-shark