My advice would be the same as Marion's. Profiles created by GEDCOM imports are "messy" so they have to be "cleaned" by deleting a lot of stuff and the sources are not presented in a format which make them easily accessible by others (especially since most of your sources are going to be behind Ancestry's paywall.)
You cannot subdivide your GEDCOM if it comes directly from Ancestry.com, so if your tree contains more than 5000 individuals you will not be able to upload it to WikiTree.
It is recommended that you keep your uploaded GEDCOM small (500 individuals or even fewer.) If you don't, the GEDCompare process takes a very long time (where you compare every person in your GEDCOM to potential matches who are already on WikiTree.) You cannot add even a single person to WikiTree from your GEDCOM until you complete the GEDCompare process.
When I first joined WikiTree, I uploaded a GEDCOM and went through the GEDCompare process and added a couple of profiles. I hated it almost immediately and abandoned that way of adding profiles. I now add all profiles manually. It is slower, but, in my opinion, you end up with better quality profiles.
Most of the sources I use in the profiles I create manually come from FamilySearch which is free to access. There are a few sources which I can only find on Ancestry.com. There is a way to add them and provide a free link to the image. I won't discuss that here, but others will be happy to share that process with you when/if you want to or need to use Ancestry.com image files as your sources.