Hi Darcy,
From the WikiTree Honor Code (additional emphasis added), "We know mistakes are inevitable. We don't want to be afraid to make them. We assume that mistakes are unintentional when others make them and ask for the same understanding."
Hoping only to be helpful, I was drawn to WikiTree in 2011 after a cousin added WikiTree profiles about which I hoped to collaborate. Separately, I had also found a WikiTree profile associating one of my early ancestors with the wrong parents.
Initially, I mostly posted comments to profiles. I took a long break, and then returned. I took another break later, but also returned.
As to adding and editing profiles, I did start slowly. Did I make mistakes? Yes, and in that process, I learned a lot, pretty quickly. (I still make mistakes, as do we all; I still find mistakes I have made that need to be corrected.)
There are many good suggested offered in this G2G. Some things that worked for me follow (your mileage may vary),
1. Eventually, I added one or more personal WikiTree free space pages, and used those to practice entering and formatting sections, text and sources. (I still use some of the same free space pages for that purpose.)
2. The time I spent reviewing posts on G2G was helpful. Some of those posts were "how to do this or that," others allowed me to review how different WikiTreers had built well-styled profiles. I learned, as you have, to also post questions on G2G.
3. As earlier, I added comments to profiles, but learned to keep a list of particular profiles in my personal "scratch pad" with links to comments that would need follow up.
4. I opted not to add profiles en mass or via GEDCOM. Partly because I hoped to add "current" research to WikiTree profiles, and partly because I had too many ancillary profiles in my personal database (profiles about folks associated but not necessarily related).
5. I don't feel pressured to rush a profile update. If I feel the urge to "push it," I know it's time to take a break and make a fresh attempt in a day or so.
As others have commented, as your time permits, do keep with it. Believe you'll find the collaboration opportunities on WikiTree are unmatched. --Gene