Giving your pets affection and care

Having a pet is something very special. Since I was a child, my dream has been to own a dog, but unfortunately my mom never liked my idea. Because of this, I decided to help many dogs during my life. I always try to help dogs that don't have a safe place to live. I give them food, water and caring. I love pets, and I'm sure that all the love that they give us can have good effects on different people that have been facing problems. When we have a pet, we are receiving a therapeutic treatment through love and affection. The presence of animals in our lives and houses can bring more light to our days, and children that have been raised with pets tend to be more charitable and kind.

Good job!

Studying abroad

I'm going to Sydney to study English for a month alone.
I have never been to a foreign country, so I'm a little anxious about studying abroad.
On the other hand, I look forward to going to Sydney because I will be able to make friends with people outside of Japan, learn about the culture of Sydney, visit tourist attractions, and so on.

I hope I can learn to speak English fluently. 
I have to work hard at speaking English.

Hard work

Hard work is the key to success. We can't deny the truth that if we work hard we can achieve any goal in our lives. But people often forget about the simple truth that the process of hard work is not so simple. Two or three days of hard work will not land you anywhere. One must go through an arduous process to achieve one's goal. But when you reach it, you will be extremely grateful and satisfied because you will know that you have worked day and night for it.

Here is my opinion. I think adjectives are what modifies nouns. Sometimes you might have a compound noun made up of two nouns, like "science history". A person who studies science history (compound noun) is a science historian. I'm not too sure whether "experiment gadgets" is accepted widely in formal writing, but it sounds okay at least in conversation. In either case that would also be a compound noun.