Learning to Draw (People)

I have wanted to learn to draw for a long time, and this spring I finally started actually trying to improve myself. Lately I've focused on humans, but I would also like to be able to draw beautiful roses and realistic coffee cups. The photos below are drawn during 2016, and they show that few months ago, I wasn't too brilliant. But I've got better.

April 7th. Horrifying.

May 30th, I used Adam Lambert's record cover (Trespassing) as a model.

Some day before the drawing below... No model used.

May 24th, used some random pic I found online as a model.

April 6th, I was learning to draw a female body.
Most of my drawings have been manga girls,
but I like realistic style more nowadays. 

April 1st, learning to draw a male body,
that darkish mess is accidental.
No model used.

Trying to find the best way to draw mustache.
That green dot is a squashed bug,
I was drawing outside...

Used a pic of Adam as a model. Surprisingly.

Yeah, I've determined to learn to draw Adam.
I just ran out of drawing space with this one.

I've been drawing a picture of Adam for two to three weeks now, I'm trying to finish it today. It's a lot better than any of the pictures above... I've improved a lot in a rather short time. I guess I have never really even tried to do my best while drawing, before now. However, I think I still need a model pic in order to draw well.