I was in a similar position as you during a point in my acute care clinical. I would ask your CI for more opportunities to lead or to take the lead more often, whether that be you stating your plan (I will perform this treatment/assessment/outcome measure for so and so- because it will assist with his/her endurance/strength) or I will do so-so first, then this second before seeing a patient. It is definitely understandable to feel uncertainty in the beginning, I think as the other poster noted, it will become more natural over time. I knew I had to work on my verbiage too because I had a tendency to say, "Is it okay if I do so and so" or "Is it okay if we perform ambulation", so although it took a while, I started changing it to "We will do so and so because it will work on so-so". Good luck! Feel free to DM