I need to foreclose on a property that I owner financed. Where can I find info?

[Brown Malo]

Hello,

I have a property I sold and carried the note for the buyer using Owner Finance.  They have failed to pay and I need to foreclose on them.  Where can I find information to make sure I am doing everything correctly?  It is in May, TX and I am having trouble finding Real Estate Attorneys that are willing to work in that area.  Is there a website or a book I can follow to make sure I do all the necessary steps to get this accomplished?