Filing for Kinship Adoption in Texas

Hello, I am in search for information regarding filing for adoption in Texas. I was awarded sole managing conservator of my nephew who now lives in California with my wife and I. This is after both parents' rights were terminated. We would like to file for adoption as I am a Texas resident in the military stationed in California. I researched in filing for adoption here in CA but it would seem that Texas and CA do things a little differently and it is starting to look as a more complicated task to have it done in CA. Does anyone have any advice for filing a kinship adoption in Texas? If it's anything like CA, I would just need to file the paperwork and have a hearing. Thank you.