... characteristic from my point of view . It is hardworking . The reasons of my opinion ... .
To make good introduction paragraph you can use this pattern.
1. Background Information.
You already mention it in your first sentence. Unfortunately, your explanation is extremely unclear. It is good if you can connect it with today's condition, give the real condition in the world, or you can emphasize it with start your explanation with fact or some researcher's research.
2. Thesis Statement
In your second and third question you already mention your thesis statement. However, your sentence is too short, especially in third sentence. To write the best thesis statement, you must emphasizes and give the reason why you decide to select "hardworking" as the most important characteristic. You can add comparison with others, or give positive aspects with this kind of work.
3. Reasons. You must write the general reasons or just short explanation for your statement. The good essay is when the reader already know what is your aim in your essay just read in the first paragraph. So, it is good for you to mention minimally about the outline of your explanation in the next following paragraph.
Break a leg !