Nervous!

Not really. I don't know my opponent's age or whether he/she is cheating or his/her OTB ratings(if he/she don't showcase it).

I know what you mean, it is just one of those things you have to adjust to, you have to remember not to throw your phone or punch the monitor when you lose.

I say find some really good vibed rhythms and blare them on headphones. It also removes distractions, and the type music I use is some psybient chill..
If you have an account with some Music app look up "Kisnou", or "Poolz", or "John Arn", or this YouTube with them on it.
I am always nervous while playing online, any tips to release my nerve?