If you have used forums in the past for any reason, then you will have no trouble using a Wix forum. Ultimately, all forums are the same. One thing to keep in mind when posting in your forum is that you want to write good, quality posts. Whether asking a question, starting a conversation, or replying to someone else's question or conversation, quality posts matter. They can help you recruit.
On a side note, if you're worried about typos and grammatical errors, Grammarly can help. Grammarly is free-to-use and works with several browsers, particularly Chrome. Simply click the link, and follow the instructions to have Grammarly check what you write online.
Please note that Grammarly can be annoying at times. This depends on the site, but it's great for Wix forums. If you need to turn Grammarly off for a site, just click the green Grammarly icon. In the panel that pops up, there will be options for disabling Grammarly.
Also, most forums have issues of one kind or another. Steam has issues. Reddit has issues. Every forum has issues. Wix forums are not immune. If anything stops working or gets wonky, simply save or publish your work, refresh the page, and then click on the three dots at the top of your post and click edit. 9 out of 10 times, you'll be back in business.
That said, to learn about creating quality posts, click here.