Hi and Welcome! Great start with drowings!

Your question belongs here:

http://www.truefresco.com/cgidir/dcforum/dcboard.cgi?conf=DCConfID1

(in fresco painting conference)

I will move it there after you read this post.

You shoud start by spending some time in that conference (forum) has most of what you need also,

http://Fresco-Tehniques.com (not yet complete, but should sturt you up)

http://dolphinfresco.com (illustrated start to finish fresco)

and explore links in my signature for mor stuff and Post!

good luck