While I don't live in the Houston area, there is a good thread on this subject that can give you some info on caulking until someone from your area chimes in. Try Tell me more about caulking...
for starters. There are many additional threads discussing this subject...try doing a search using "caulking exterior" as the keywords.
As far as a mentor...you'll find lots of knowledgeable folks right here on the forum! Another idea is to look into the local WBCCI unit in your area www.wbcci.org
. Houston is in Region #9 and there are several groups in Texas, there's sure to be one to meet your needs.
Good luck as you begin your restoration!