I found out a website.

I found out a better good website for learning English, which it's called 'italki.com'. It seems to be much better than this other websites.

Here is how I would write this:

Good Website for Learning English

I found a good website for learning English, its called 'italki.com'.  So far it seems to be better then other language learning websites I have used.

Hope this was helpful.

I found out a web site.

I found out a better web site for learning English, which is called 'italki.com'. It seems to be much better than this website. 

Keep up the good work!