Hi Cedric, You're right to be concerned about duplicate content. I recommend that you take a few more steps to be completely sure that your site has a chance of performing well and being indexed and not penalized.
- You should write a unique title, the titles are much too similar
- You should write a unique introduction before quoting the article and additional unique content after the quote
- 300 words is too much for a quote from another article -- consider doing 150-200
- Consider using just 1 image instead of 4
Because you are only partially copying the article and linking to the original source there is very little chance that you will be penalized. However, your copied article will not be considered valuable because it doesn't have any original content. Just a few tweaks and a little original content should help and give you a chance to be indexed/ranked. Best of luck with your site and keep up the great articles.