Unforgettable incident in my life.

Hi all, Please give me your suggestions where the updations needed in the below paragraph.
Is there any confusion in the tenses which I have used here? Please suggest me. Thanks in advance.

"I am very much happy to share my personal experiences with you.
At my childhood days, I remembered that I used to go to school by bus.
It was hardly more than two hours journey from my hometown to school.
I have enjoyed the travel very much. While travelling, I have seen very huge trees, plenty of trees, beautiful flowers and attractive valleys. But the toughest job is that, we need to travel inside the forest to reach my school. Days passed by. One day, when I was travelling to school, the bus stopped suddenly with huge noise. Everyone in the bus got screamed loudly. There was a big bear standing in front of bus and shouted angrily. It tried to attack the bus. Everyone in the bus was shocked. We have spent around one hour struggling with Bear. No improvement. At last, we have decided to call the police. Police started shooting towards sky. Bear started running towards the forest. With the help of police, we rescued safely".