Okay, you will never “feel” ready for your first competition.
If you’ve got all your gear to do the match and you can perform the necessary skills safely you’re ready.
Mentally you will feel there is “just one more thing” you need to do or something to get. Or you will feel you need to “just get a little better”.
Sorry, those feelings will never go away. The people who go to matches just no longer let that stop them. These feelings can motivate us to practice and improve for the next match. It’s a wonderful never-ending cycle.
I can talk about the reassuring stories when I have, or someone else, forgot crucial things. There was almost without fail someone who had an “extra”. Extra guns, extra ammo, holsters, eye and ear protection, extra stogies to smoke, extra beer. You name it someone brought spares. It might be the nature of the sport.
To chime back in on safety. For your first match if you feel uncomfortable doing anything talk about it with the SO or RO.
It’s up to you now.