I want to make friends. (We must use punctuation to end a sentence.) 

I just began use the  (No need for an article here) Italki three days ago. (We can end the sentence here.) I want to practice my written English. But I(Remember to capitalize the letter -I when it is used as a proper noun. We must always do this.) really not good at it. (We need a subject here) I (We need a verb) am  hoping there (Let's change our tense.) is  someone can help me. I will be so thankful for your help .I like to make friends, and want to find some friends in italki, too.

You have good start. I am James and English is my first language. I am delighted to serve you in all of your language learning needs. 

I want to make friends

I just began use the italki three days ago,i want to practice my written English.But i really not good at it. hoping there are someone can help me,i will be so thankful for your help .I like to make friends ,and want to find some friends in italki too.

I want to make many new friends on this Italki website while improving my english skills. I just began using Italki three days ago. I want to improve my english writing skills. I am not as good at english writing as I want to be. I am hoping someone will help.  I will be very thankful for their help. I also like to make friends and want to find some on Italki.

Don't worry too much about grammar ...   just focus on the changes and it will naturally happen.

I want to make friends

I just began using italki three days ago. I want to practice my written English. But I'm not really good at it. Hoping there will be someone who can help me. I will be very thankful for your help. I would like to make friends and I want to find some friends on italki too.