Yes, those will work just fine. I myself am going over Andrew Loomis, drawing the heads and hands, book material. Which while dated is still one of the best. You can look up his books online.
Mark’s books are great.
"…whatever your motive, try not to be impatient.
Impatience probably been a bigger stumbling block in the way of real ability than anything else.
Doing anything well, I’m sure, means hurdling obstacles of one kind of another most of the way the goal. Skill is the ability to overcome obstacles, the first of which is usually lack of knowledge about the thing we wish to do. …
…Skill is a result of trying again and again , applying our ability and proving our knowledge as we gain it.
Let us get used to throwing away the unsuccessful effort and doing the job over. Let us consider obstacles as something to be expected in any endeavor: then they won’t seem quite so insurmountable or so defeating."
[-pg 19 Andrew Loomis, Drawing the head and hands.]
Those words gave me a lot of hope that I could be better and made me be less afraid of not being good. I have a lot of fear which is very hard to overcome for me anyway.
So I am on your side and cheering for you…go for it…and I will do the same.
I could post my drawing study’s in the traditional forum…they are really bad. which I hope is a good sign.