It's my first website so forgive me if the question will be idiotic. I want to add blog to it but I want this to keep the same look/ template as the rest of the website not default script skin. Is that possible?
Do you mean to say that you have one site already and want to add blog to it with same design as your site If yes then you have to hire a person for that job. DON.
Ok then hire a person to do that job for you (design and coding for blog to match look with your current site). DON.
For $10, ThemesPress.com will "automatically convert your HTML and CSS based design into a WordPress blog theme." I haven't personally used them, but I have read good reviews from others.