Taking charge in the bedroom

So my bf is the type to be the dominate one in the bedroom, like hardcore lol. But I want to surprise him by taking charge... Its just that when I try I freeze up. Like I want to talk dirty like he does but I have such a hard time. We just started living separately so the next time we see each other (maybe in a week or more šŸ˜ž) I want to give him a really fun time. Does anyone have any tips or words of encouragement or really anything pleaasseeee!?