You can file for divorce yourself however, it is recommended that you retain an attorney. Even simple uncontested divorces at times can become complicated. If you like you can contact my office for further assistance.
Texas has "no fault" divorces. You do not have to have grounds to get a divorce. Child custody depends on lots of issues, but the most important is what is in the best interest of the child. You need to talk to a good family law attorney.
Feel free to contract my office to set up a consultation. I'll be happy to talk to you in more detail. For educational purposes only. No attorney-client relationship was created by this communication.