Read my composition and correct if you find any mistakes?!

Read my composition and correct if you find any mistakes?

Hello!
My last rock concert
I love rock concert! I´ve already seen many live bands and I also have a band and sometimes I play for some pubs or rock fest. My best rock concert was in Vancouver when I went to the Metallica concert. It was an amazing performanced. I am from Brazil and I live in São Paulo, here there are many concert band...my last concert was Motorhead in April. Great show!! by the way, I am bass guitar for a Motörhead cover.......this is a great job to play songs for Motorhead!!! Yeah.....Last Saturday I had a "gig" for a rock fest in Downtown. That show just was regular presentation!!! Unfortunately the stage equipament was terrible!!.....but it´s ok.....We rock anyway...hehehe...." ACE OF SPADES".....
My next presentation will be in August, I hope the song equipament work better than the last one.
And the next famous concert, I am going to see in September When Marilyn Manson will be here in São Paulo. I´ve already bought my ticket..Rock on.

I love rock concerts! I've already seen many live bands. I also have a band and sometimes we play for pubs or rock fests. The Metallica concert in Vancouver was the best rock concert I've ever attended. It was an amazing performance. I am from Brazil and I live in São Paulo, and there are many bands that perform here. The last concert I attended was Motörhead in April. It was a great show! Incidentally, I am the bass player for a Motörhead cover band, and it is a great job! Last Saturday, I had a "gig" downtown, it was a rock fest. Unfortunately the stage equipment was terrible, but we rocked anyway! ACE OF SPADES! My next gig will be in August, and I hope the equipment will work better than it did the last time.
Then in September, I am going to see Marilyn Manson here in Sao Paulo; I already have my ticket. Rock on!!!

heres my changes. i wish i could come to sao paulo to see marilyn manson...