Oops, I mean "I look forward to meeting with someone" 

Lo siento! 

First notebook entry: Introducing myself

Hello everybody. (full stop) My name is Juan Moreno and I am a chemical engineer. I am 22 years old and I am practicing English (capital E). (fullstop) and also I'd like (I'd also like' sounds natural) to help people to learn Spanish (as in this case, it's a noun). I would be so glad if someone wants (would like - polite form) to learn Spanish and .I look forward to meeting someone who can help me to learn very good english (learn English very well - sounds natural) 

Polished version

Hello everybody. My name is Juan Moreno and I am a chemical engineer. I am 22 years old and I am practicing English. I'd also like to help people learn Spanish. I would be glad if someone would like to learn Spanish. I look forward to meeting someone who can help me to learn English very well.

Tips: 

Use a full stop when changing the subject of a sentence.

and - try to use this word less. For example. If you are speaking, can you say that whole paragraph in one breath? 

practice vs practise (this rule only exists in British English, but is good tip to know ) 
practice - is a noun
practise - is a verb

Does that help? I hope so :)