I used a myheritage DNA kit on myself. It worked pretty well. Just be warned that it will notify you of DNA matches from relatives
AncestryDNA or 23&me are the best options out there right now. You can opt in/out of seeing DNA relatives if you just want to see the ethnicity breakdown. They have decent sales on almost every major holiday.
I personally used AncestryDNA. Don't allow match findings if you don't want people writing you suddenly.
My husband and I did ancestry dna , if u share any genetic markers with anyone who used ancestry dna it could link you to them as well .