Yes. Now that you have uploaded the GEDCOM, you will need to process your GEDCOMpare report. This report will present possible matches to the individuals in the GEDCOM. You will have to evaluate every possible match and either accept or reject the match. Once you have either accepted or rejected every potential match, you will get "ADD" buttons next to the names of the individuals in the GEDCOMpare report. You can then select which of those individuals you wish to add to the WikiTree worldwide tree. (Note: there are no individual trees here, it is all one big collaborative tree. You will be Profile Manager for the profiles of those individuals you add to the tree, but others are able to "add value" to those profiles by adding sources, information, etc. just as you are able to "add value" to profiles which other people manage.)