An interesting article. However, as a native English speaker from England, I was taught never to use a comma before 'and' when using a serial comma.

A short story about my English practice.

Well, it's not as easy as I thought:)), especially the English grammar. I started learning English about 3-4 months ago. I was not a good learner at school so didn’t know about the grammar and pronunciation and etc. I only knew the English alphabet and some words. In addition, I learnt* English without a teacher so it's a little bit of a challenge for me:)

* I think this could be learned OR learnt. the region I’m from in England, we would say learnt. 

I'm a foodie.

I went to a well-known restaurant whilst on holiday several years ago. 
I'm a big fan of going to famous restaurants because I'm a foodie. Trying new foods and going to restaurants are some of my favourite hobbies.
It was a very nice place for foodies like me.
l went to a well-known seafood restaurant 
and there was a long line of foodies outside the restaurant. I waited for about two hours.
The dish was done just the way I like it and the food tasted lovely because I was literally starving.
I pigged out and got severe indigestion so I vomited several times.
I went to the pharmacy and I got some medicine to make me feel better.

Are you a foodie by any chance?

I'd like to know the proper connection between sentences!
I'd like to know more about natural English expressions and correct the sentence as if I were talking to a friend.

Life of youth

In our country there are two types of youth. Some lead a good way of life and others do not. Some young people prefer sports. They go to the gym almost everyday and do physical exercise. They eat healthy food and lead a healthy lifestyle. But there is another type of youth. They like to go to parties almost every evening. Eat a lot of unhealthy food. They live to eat and go out. Of course there is nothing wrong with spending time for entertainment but we must remember that we should be healthy. If we eat a lot of unhealthy food, then it could lead to some kind of illness. You need to appreciate yourself and your time and be a youth that someone will remember forever and set an example.