All my lines immigrated as Scots-Irish but there was a lot of mix prior to immigration as evident in my DNA mix - 48% British, 25% Scot, 24% Scandinavian and 3% mutt. I'm proud of my mix. Who knows which little part contributed what to today's me and I'm quite happy with me as is.
2020's Ancestry is very much different from 20 years ago. Many states have put their old public record (birth, death, marriage, etc.) on line and they are available and searchable by individual name through Ancestry as well as the public trees of lots of other amateur researchers.
It's true that these trees often include a lot of incorrect material but if you remember that the Public Trees are nothing more than the findings and assumptions of other amateurs such as yourself and subject to error as your own research would be if you gathered and shared it with others.
If you study about how census records were gathered in earlier times (such as the 1800s) you'll be amazed at their accuracy and wealth of information.
For serious researchers, Ancestry's cost is worth it.