This is one of the Jiu Jitsu benefits that will take a bit of time. However, the moment you get a chance to teach-one will come your way sooner or later- grab it! Even if you don’t think you’re “teacher material” just do it for the experience. The benefits are immense!
If you can, start helping out with the kids’ groups. However, starting to teach or demonstrate in any group is going to do wonders for you. You’ll find amazing things happen when you start teaching others BJJ. You’ll not just learn way more yourself, but you also get a sense of accomplishment and giving back to BJJ, while still learning it yourself!