joining a new website/community club (*more appropriate word)

First of all, I discovered/found out about knew this website/community club two years ago and I always wanted always to join your community. I hope I can learn from you and share my knowledge. Also I hope I can experience working in a group. What I am really interested in is the projects which are aimed at to helping people develop new skills develop the fragil class.

Your last sentence could have two different meanings. Which are you trying to communicate?

1. I am interested in projects that help people who are in poverty or have many problems in life.

"What I am really interested in is the projects which are aimed at developing skills for disadvantaged people."

2. I am interested in projects that help people develop new skills.

"What I am really interested in is the projects which are aimed at helping people develop new skills."

Mehdi, I assumed this entry was about italki.com, so I changed a few words to make it clear that you are talking about a website. English speakers don't use the word "club" to refer to a website. However, you can use the word "community" to refer to a social website where you interact with other people, like you did in the first sentence. I removed spaces before a period (.) where you had them. In English, we don't put any spaces before periods, only after.