Be the best I can be

Today, I began my job that asks for a lot from me socially and I love that because I love to challenge myself and I want to improve socially. But I don’t quite know how I can go about it from this point on. I am an orientation leader and I had a small group of students that I was supposed to be a leader to but I didn’t reach my goal at all imo. My coworkers hype me up, but if they were there with me then they would know that I didn’t do as well as I strive to. I like my job so far and I got it for a reason, I want to help incoming students. I am given information that I have to talk with my students for the day about and today I just said too little. First of all, I was supposed to gather my students at some point by yelling to make sure everyone knew that it was time for us to move and for them to follow me but I just couldn’t bring myself to do it. I’m not a yeller and I’ve had this same problem of failing to be able to raise my voice, especially in a loud place, in past jobs as well. So that’s definitely a no-go for me as I want to be able to speak up. Then once we actually got to our space and it was time for me to talk to and with them, I wasn’t feeling nervous but I definitely presented as nervous. I had a whole script of what I could say yet I just skipped a bunch and flew through a PowerPoint that I had to present as well while being brief and vague with everything I said. Time constraints were another concern and so I just didn’t know what I could afford to say or do but at the same time I did know. So overall I’m completely unsatisfied, and I feel like I wasn’t helpful at all to my group even though I really aim to be and I want to convey that I’m actually excited to be there to help welcome them transition to college. I also want to help my groups to get out of their comfort zone and get socializing, a few people in my group talked amongst each other but I want better for the students I’m supposed to be leading. Please give me concise advice!