Hi,
I guess if you want to be a Sims Youtuber, you start by making a Youtube account, then start posting video's, and hope people will watch.
It's not something you can apply for here on this forum.
But perhaps I misunderstand your question, so feel free to clarify.
Like @Heddelviven says, it's a case of setting up on YouTube. I used to know someone who does this for other games. They chose a memorable screen name, set up the equipment and off they went. We're no longer in touch as they broke up with a loved one of mine recently or I'd have reached out to ask them if they had any tips. But there are some players on here that have done it I think.
Just be safe, whatever you decide to do. Maybe take a look at other channels for Sims content to get ideas on how they did it and how they operate.
