first week drawing

Nice first attempt, nion, that's showing some very great promise. If I could give you a sincere recommendation, then it would be to make your faces less stiffest, and the most dynamic, energetic, and fluid. The reason why is because, you could be OK with making some bad drawings before making some great ones; and, your heads will become very solid, gestural and appealing.

Hope it's been essential and totally instrumental.

Nice try, it's an excellent starting point for your artistic career. Line-of-Action has a section on faces and expressions. Check it out. You also need to do a good study of human anatomy - both muscle and bone structure. Make drawings and keep them close by. To draw the human body you need a good knowledge of human anatomy. You can do this study on your own (the internet has a lot of information on the subject). L-o-A has a section on hands and feet add this to your studies. Perseverance is what you need (stick to it). Remember: Practice makes better.

The nose perspective is a bit off but overall it pretty good!

Keep it up!