Texas: Alternative Route Certification versus Masters of Art in Teaching?

I am interested in obtaining certification to teach in the state of Texas (Houston area). I hold a BFA in Graphic Design, and wish to teach Art at the Elementary or Secondary level. I have gone to the state department web-site to research requirements, but am still a little confused as to the best route for me. If I understand correctly, I can attend a University or District sponsored program to receive alternate route certification, then p my exam to finalize such. I may also opt to enter a Masters program which I think would result in certification? Can anyone sum up the certification process and options in a more basic way than the websites I have been researching? Would you recommend doing alternate route or putting in a little more time to get the Masters? I realize that Art positions are few and far between. I am also interested in English/Literature at the secondary level. Would this choice better aid in finding a teaching position? Also, are bilingual candidates preferred in most districts? I am hoping to find a position in the schools outside the city, as I have been advised against working in the HISD. Any advice on this? THANKS! I know I asked a ton of questions!