First year also
Last summer was my first year in competative shooting also. I had no idea what I was doing, and felt completely out of my league, which I was.
I think the key is you have to be able to laugh at yourself. I had one match where it all went wrong. It began with the .45 jamming on about every third round, and from there it went downhill. My temper was on high, I was embarrassed beyond belief.
Then the RO said to me to just let it go, I was not the first to have it happen, and just take the day to learn how to prepare, and laugh it off. When you figure out the only one who cares is you, the day goes well. I just started laughing at the errors and misses, and even those with me did nothing short of give me support and tips, they had all walked down the same road as I was on.
I certainly learned not only to check the function of each round I was taking, but to ensure they WORK by practicing each batch of reloads. Make sure you remember to CRIMP the little demons, remember to count your shots, and on the list goes.
You won't be the first to mess up, and not the last. I watched one match where one of the best gunners turned around to shoot a steel right after the rules were gone over twice that if you pass the plate, you missed it, don't turn around and fire.
Enjoy it, you will only get better.