is the cuco concert for 7/3 all ages don't wanna show up and not be able to get inside so i need clarification if i am able to enter the venue without having to step aside (i am 15)

The website will state if there is an age restriction for a show. I've seen 7 year old kids at Judas Priest

I would try to research that, maybe call the factory and ask. Every concert is different. In my opinion, I would say no because there is a bar inside and you'll probably have drunk people around and I don't think that's appropriate for those under 21. I went to an Alejandra Guzman concert and there were alot of drunk people.