The information you have will make some sources of information useful, and
others useless. For instance, it would do you little good to find your
Final Decree of Adoption if all it contains is Adoptive Family information, and
your Adoptive Name. You are seeking facts about your life UP TO the time
of your relinquishment.
*DO NOT ASSUME that your date of birth has been falsified.
This is a more rare occurrence than you might imagine, and you need a
starting point for your search! Perhaps it is better to think of
it as accurate, and keep your mind open to possible variations ONLY if
no corroborating evidence can be found.