2) Haters gonna hate. If you want to learn to draw, you have to pass through the stage in which you copy from reality or other sources. If people give you a hard time for that, just disregard them and focus on what you can do and what you like – especially since you're not making money off it.
The important thing is not to disregard constructive criticism and use it to become a good judge of your own work.
@miramarco Absolutely agree on conceit. I don't shy away from it.
And good advice to hear on the haters. When they rant about copying, I think back on the great masters who spent decades "just" copying others in training, and I wonder why the copy hate. It's hella good practice.