how much do you spin articles?

if thats the correct term.
im starting in this buisness, and other then the fact i have very little knowladge in article writing/copywriting, english isnt my first language.
i understand that google treat badly to duplicate content and a great option is to spin the article, switch some words etc.
lets say you write a 300-400 words article to your site, is it smart to spin it over and over again and upload it to article sites?
how can i generate content other then write it all from scratch? i guess writing 10-20 articles will be kinda fine, but what happen when you want to fill your site/article sites and need to write hundreds of articles?

does the fact im not native in english can hurt me here?
also, how common is it, especially when you dont know the subject very good, to paraphrase others articles? maybe even join 2 paraphrased articles, a few from one and a few from the other?
i guess you need some source to learn from and others articles/sites are a good source.

It is always advisable to spin the articles as much as possible. This way you get more unique versions of every article.

The quality of the article is important for both the search engines and for the readers. If you are not fluent in English, I would suggest you outsource this work or sign up for an article spinning service.

3 paragraph spins.
4-5 Sentence spins.
Word level spinning with as many variations as possible.

I can use this 100+ times easily!

If you're just starting out I would focus on good content and get the feel for that first. Then move to more advanced tactics like spinning and automation.