I provided links to a couple that I see advertised the most. This is not an endorsement of either one just what I have seen or personally used. Just compare each one for you and see what’s best for you.
There are a number of geneology DNA kits. They all do about the same thing or the basic thing from what I can see. They break down where your DNA might be related too based on region. Some do more things and some do less. You would just have to compare them all and see what’s best for you and for hat you are looking to do. Personally, I did the Ancestry.com.
They vary in price. Some range from $80-200. Depends on a lot of factors.