Cynical_Saint,
Welcome aboard!
Good to see you start up a Sketchbook. I look forward to seeing your progress here.
Regarding measurements, I would suggest looking into both Andrew Loomis’ books (which you can still find online) and in particular, I would recommend getting this book by Anthony / Tony Ryder, a fantastic figurative realist:
[/b]Ryder lays out a very useful technique for doing basic measurements that really seems to work for people who study his method.
If you want to see the work of a beginner who has been using this book, see Mr. Mu’s impressive progress here.
I think that particularly for beginners, it is important to work less from photo reference, and more from either life or from master works, doing master copies. Spatial relationships are difficult to define from photos, and it takes a lot of practice doing life drawing and master works to know what to take from a photo and not create an image that looks flat or photoreferenced.
Do you have access to a Life Drawing course or to Figure Drawing Sessions? There are many sources for doing Master Copies here on the Forum:
Open Figure Drawing Workshops (OFDWs) are open to anyone and to all media ~ 2D Traditional and Digital, and even 3D. Lately the OFDWs have been devoted to doing Master Copies from provided Reference. These Workshops run for 4 weeks.
You can find links to the best of previous OFDWs here:
Links to all OFDW SPOTLIGHT Threads
You can find links to the full versions of all OFDWs here:
Open Figure Drawing Workshops
Links to all OFDW SPOTLIGHT Threads
Another very successful Workshop Series is the Anatomy Lesson Series - great work in these threads, highly inspirational:
Anatomy Lesson Series: Body Part 2 - The Torso
Anatomy Lesson Series: Body Part 1 - The Head
To be notified of new Tutorials and Workshops as they appear on the Forum, I suggest subscribing here:
Notification of New Open Figure Drawing Workshops / + TUTORIALS - SUBSCRIBE HERE!
I suggest getting the Ryder book and finding Loomis’ books (particularly, his “Figure Drawing For All It’s Worth”) and then try a Master Copy. I think you will gain a great deal from doing master copies, vs. copying from photos at first. 
Cheers and Happy New Year!
-Rebeccak









Funny thing is that I kinda stopped concentrating on getting a good likeness, and it came all by itself. (Methinks perhaps it is just luck). In any case, I love this drawing because the likeness is great, but I hate it because of the proportion of the head. Ugh, always give and take aint it?



