I felt exactly the same way, and it was quite an adjustment for me too! At my old job, we were not nearly as busy and you could be all caught up from one day to the next. Sometimes we would save something for the next day just to have something to do, lol. The only time things were really busy was the holiday season, and for the last five or six years I was there it got less busy with each passing Christmas.
Another thing that I had to get used to was the fact that there are a lot of TMs who have no sense of urgency, and are not really concerned about getting things done in a timely manner. To this day, it really bothers me when I hear two or three TMs laughing and joking around while taking their own sweet time doing their work. When I first started and saw TMs just standing around and talking, I would think to myself "WTF, don't you see how much reshop there is to put back, not to mention that half the floor is trashed? Why are you just standing there?!" 😬
I guess my best advice is to just do the best you can each day, do whatever your leader tells you to do and show them that you are hard worker and eager to learn. Hopefully it will get noticed. And if you want hours, you have to go after them - that was something else I really had to get used to, as I was always full-time before and getting hours wasn't an issue. Unfortunately, with the way the system here works, hours are often evenly distributed and it isn't always up to your direct supervisor who gets what. I have to have a convo with my TL soon, because I am not getting the hours I want and I have noticed that other TMs are getting more, and swap shift posts get taken quickly. Need to put a bug in his ear and see if I can't get some longer shifts.
Good luck, hope you find the board a helpful place, I have really found it a great resource as well as a good way to vent, and hear others' perspectives on life at Spot. 😀