I would really encourage you to do a ton of anatomy studies if characters are what you're looking to get into, it's the first thing to learn and the easiest for fellow humans to spot as "off." These are my favorite free tutorials/resources, but there are plenty more around: General Character Design References (huuuuge…
I think this head tut is better https://www.youtube.com/watch?v=AnfVrP6L89M Female base mesh tut http://antcgi.com/tutorials/realtime-character-modeling/ And here are some few more links http://www.polycount.com/forum/showpost.php?p=2035184&postcount=12