The first thing that you must do in Texas when you have an idea that you may be contesting a will is to contact a Texas attorney and you should contact the lawyer as soon as possible.
Since contesting a will is litigation, you need to contact a lawyer who is familiar with litigation. Some lawyers mainly have an office practice where they draft documents like wills and estate plans for their clients and handle cases that do not normally involve litigation. Trials are seldom or never part of their practice.
Other lawyers have litigation practices where most of their cases involve suits filed in court. They may or may not be Board Certified. Since a will contest that can't be settled involves a suit filed in court, a trial attorney can help you decide if you have a good case. He can also evaluate the possiblity of settling a case without filing suit in court.