What's the most surprising thing you've met?

I'm new in italki and have (,I've) just found we may need Skype to communicate with partners. (parters.) However, (But) I haven't use it for several months. Oh,my God! I can't remember the password, (,) I always forget (all the) passwords!! So I had (have) to try some familiar (familair) numbers. What a surprise! I was successful first time. (got it just once.)  LOL

With the grammar, you should put the comma immediately after the word and then leave a gap - not leave a gap before the comma. After the full stop, you should also leave a gap. We don't start a sentence in English with 'but' or 'and' usually. 

What's the most surprising thing you've encountered?

I'm new to italki and I've just found out we may need Skype to communicate with parters. But I haven't used it for several months. Oh, my God! I can't remember the password, I always forget all the passwords! So I have to try some familiar numbers. What a surprise! I got it on just one try. LOL