This is an easy answer.

As there are a lot of DNA companies which one will allow me to find a match or matches?

The odds’s are that if you choose a DNA company, your relatives chose a different company.
How do you change the percentages into your favor?

The Big three DNA companies in the United States are:

1. 3andme.com
2. Familytreedna.com
3. ancestry.com

Test are relatively inexpensive these days so:

TAKE A DNA TEST FROM ALL THREE COMPANIES.

I estimate this will cover over 90% of all those who take a DNA test in the United States.

March 9, 2019