Where to learn an office etiquette?

Each company has its own culture. Might be a good idea to lay low for a bit and just observe. Office politics can be brutal if you aren't careful.

I would suggest something so simple, it sounds ridiculous, but it works. Fake it. Smile, say nothing, but just observe until you see how they talk, the phrases used, study everything you see and hear until you can join in without feeling out of place. You'll catch on and will feel like you fit in, in no time. At first it will naturally feel awkward, but you'll catch on and you can use the internet to study what they talk about, making you eventually sound like a pro. I wish you the best.

Be nice to them, but don't compromise who you are, or your beliefs.

In a larger corporate setting there is absolutely no way that you can please everyone. Just remember to do your job extremely well while appearing unthreatening to those who want to be promoted and have not been promoted.

Also, when you find a way to help others, do so. You will then be seen as a good team player. Be friendly to the boss, but do not act like a brown noser.

Be kind, hang out with your coworkers socially whenever possible, at lunch and after work, and you will be fine.

Hmmmmm is it Hines