Grammar questions to natives

Hi all!
Every day when I'm driving to work, during the traffic jams I listen to a radio show called "Pueblo Inglés". This program is a guide for a woman called Sandra and a man called Colby.
She is from Texas, but she has been living in Spain since she was a child and she speak a perfect Spanish. (and English too). Colby is from the United States too, but I can't remember from exactly where he is .
In this program they speaks about differents topics using it to introduce grammar or vocabulary.
I listen every day trying to improve my English and learn more and more. Yesterday they were talking about adjectives and the order in a sentence. I think it is a little difficult to remember the specific order when I am talking. I would like to know how important is this when I am talking with native people. Can you understand me if I say, for example, My city is big, beautiful and sunny. (I don't know if the order is correct).
I have another doubt. It is common in Spain to hear: holidays and homeworks instead of holiday and homework Is this correct? Or the plural doesn't exists?
Thanks!

Hello Gema,

It sounds like you have found a good way to learn English when you would otherwise be wasting time. You have two questions, the first one was about adjective order. It is important but people will generally understand you - it just sounds strange sometimes. I made a video to help students here https://www.youtube.com/watch?v=rtJQ8kOJEQo&index=5&list=PLIcNItpI5Y7CByenUL965_JYRKIeFp0Ch

The second questions was about holiday and homework. These are two different kinds of nouns in English. Holiday is a countable noun so it can be plural but homework is an uncountable noun (Yes I know you get homework from different teachers!) but it is comes from the base word 'work' which is also uncountable in this sense.

Hope this helps

Bob