Today

Today I had a very good day! I found out that I got an "excellent" for the first exam! It was awesome! In the morning, I was in school. Then I went to the theater, where my little brother acted. After noon, I went to my job. I work in a nursery for dogs. I must look keep an eye on young puppies. After work, I walked a little. Then at home, I talked with my lovely friends. In the evening, I remembered about my job. I had was obligated to walk a dog at 21:00. But forgot. I remembered when it was 9:13 =\ I had to run so fast! Nevertheless, we walked cool??! We walked on the huge wasteland where there is a small forest. There, the birds were singing. They sang very beautifully. But it was strange. Birds are usually asleep at this time. I think it was a crazy bird XD

Good job :)  I don't understand "walked cool." Also, a "wasteland" is very empty. It would not have a forest. 

Today

Today I had a very good day! I found out that got an "excellent" for the on my first exam! It is awesome! At This morning I was in school. Then I went in to a theater where my little brother played performed. After noon I went to my job. I work in a nursery for dogs. I must look keep an eye on young puppies. After job I walking walked a little. Then at home I talked with my lovely friends. At This evening I remembered about my job. I had was obliged to walk a dog at 21:00 9:00. But I forgot. I remembered when it was 9:13 =\ I had to run so fast! Nevertheless, we walked cool! We walked on the huge wasteland where there was is a small forest. There, the birds were singing. They sang very beautifully. But it was strange. Birds are usually asleep at this time. I think it's been a crazy bird XD

Good writing! I don't understand what you want to say for "we walked cool."