GEDMatch is free Vicky. Again, there are lots of tutorials about how to use GEDMatch, but it's mainly about comparing kits and viewing on the chromosome browser where you match.
My Heritage is still free to upload to, but if you want to view your matches, you now have to pay a one off fee of £29+VAT.
I think that Living DNA charge the same amount for uploading.
FTDNA is also free to upload to, and you can see your matches, but if you want your ethnicity estimate and to use their chromosome browser, then you have to pay a one off fee of $19.
You can download from 23andme, but l don't think you can upload to that Site.
HTH, Romilly.