The book clubs here on the forums work like this:
You pick one to join, and usually vote in a poll to say you’re joining. The novel/manga will be divided up into weeks - usually each one will have it’s own community thread made each week. When the date arrives, you read that week’s pages, and then can discuss it with the others in the book club (e.g. asking about grammar/vocab you didn’t understand, trying to translate some of it, or just discussing the story!). You don’t need to speak or read in front of others, it’s very much a “go at your own pace but with the ability to check in with the others in the club for any questions or discussions”.
And, if you’re happy to try out a script, I also created a script to be able to follow along and keep track of any book clubs a bit better.
Separate to WaniKani, I’ve found an app called Quazel quite useful for speaking practice - it uses AI to have conversations with you, where you speak out loud and it’ll reply. It’s divided into difficulties and is free up to a certain amount of usage per day. Certainly not perfect but I find it useful to actually “converse” a bit when I don’t have anyone around to practice with!