My reply has to do with the question of whether you will be rejected by your biological father's family. My brother has two adopted daughters. Like you, as they grew up they wanted to find their biological parents. My brother helped them do just that. The older girl's biological family was delighted to know her, and both of the parents turned out to be very nice people. The second daughter's quest was less successful. Her biological mother was happy to have her back, but her half siblings were very jealous, which makes the relationship rather uncomfortable. The father was nowhere to be found. However, both girls are glad their search was successful. An additional benefit to the oldest girl was being alerted to a genetic condition (which she found she had).
And here is another story that should interest you. A few years ago my son-in-law found he had a 12-year-old daughter he never knew existed. He was overjoyed. Since then he has been a great influence in her life. His family welcomed her gladly and my family, though no blood relation, welcomed her as well. She is now 22. A lovely girl with a bright future, thanks to her dad.