If you want your promo to be based on Raw then there is a Raw promo section on the homepage of the site, just scroll down and you can't miss it. The same if you want the promo to be based on Smackdown there's a section for that. As for how you should promo with Rollins, that is completely your decision. You are free to do just about anything that you want to do with your character. Promos don't need to be huge, detailed essays so you shouldn't panic about writing one and any member would be glad to give you feedback if you want it. I recommend reading some other people's promos to get an idea of what to do.