If the first genealogy DNA test you’re going to have done is for someone who was adopted at birth with unknown biological parents, consider working on a test for someone who was not adopted and whose parents, grandparents, some great-grandparents, and the basics of family structure are perhaps already known.
This will allow you to practice and to build your analytical skills. That can be easier to do for a testee where the paper genealogical tree already partially exists. You may be less overwhelmed, less stressed out about the results (because it’s not your own family), and gain some additional insight into your own search. That experience will help you when you analyze the results for the adopted individual.