My reply doesn’t answer your question, but perhaps some of it may be helpful. In no particular order…
As you may have read previously, are you prepared for any unexpected results. Personally, I would rather know the truth but I helped a family friend with his tree (just his tree, not DNA testing) and he was devastated when he found out his ancestors were from a different country than what he was told his whole life.
When you take the test, make sure you closely follow the instructions. Hubby, our younger son and I took the test at the same time, it took three tests before hubby received results. (Thankfully, we only had to pay for his first test.)
I am quite interested in looking through others’ trees when I’m bored. When I see an error I just move on to the next tree. I never copy their trees but do keep in mind their findings and do my own research.
A friend had his DNA tested. We found out his maternal grandfather was not his biological grandfather but apparently was someone who married his grandmother late into her pregnancy. Due to numerous extended family members having their DNA tested prior to my friend’s test, we found his biological grandfather’s family rather quickly (we have not yet narrowed down which brother was the bio grandfather, though). Also, we found several photographs in the Ancestry trees - friend’s mother looked very similar to her half-sister, friend also looked like his “cousin”.
Perhaps you’ll be just as fortunate with your outcomes.