My last weekend ( help me to improve and give me suggestions about my english, please :)

The Last weekend, I went to the a Kiss concert at Foro sol with my brother and three other friends.
We had to travel arround It took us around two hours to arrive at to get Foro sol. We then when we arrived we walked arround the stores because we wanted to buy some shirts and some posters.

Before of beggin the concert began, it was raining a lot. We had to wait arround for an one hour, and the people told us that the concert could be canceled. so However, we had good luck and the doors were opened. and We could were able to see Kiss and Motley Crue, and enjoy their music. music of Kiss and Motley crue. 

I have to say I'm not fan of them, but I enjoyed listening to their music. and Overall, I had an awesome weekend.

My brother and I came back to our home arround 4:00 a.m., and we were so tired.

Sounds like you had a fun weekend. Most of the corrections I made were to make it sound more a native speaker even though what you wrote was technically correct. I have to admit I am not the best at grammar, but I made a few changes to the errors I saw.