Hello, I'm Alejandro, a 21 years old Spanish computer engineering student.
I am very interested about your project, and according to the features you request (blog, categories, etc) I think the best way to take on this project is by using a blog system called Wordpress. I have many experiences within this area and I will do my best to get the project finished on time.
If you have any doubt about what I'm proposing, you can contact me. You're welcome to take a look at my portfolio (all the websites were made using that "Wordpress") in order to have an idea of what kind of website I can do (very similar to your project).
Thank you so much for your time. Hope to hear from you soon!
Alejandro Perez.