I have build this computer can I stream/play at the same time? (I would stream at 720p 60fps since my network is not that fast...) or play/record at 1080p 60fps? If no, then what should I change?
Sorry for my bad English. https://pcpartpicker.com/list/JgqmsZ
and is there any thing you recommend me to change?
No, the build is very balanced, and will be a great performer for what you want it to do. The only thing i'd say is, it might be worth OC the R5 2600 or if it was close in price a 2600x/2700x for higher out of the box speeds. Internet speeds should be fine for decent streaming, but if you find there is an impact, you can just select lower stream settings or in game settings to help stream a little better.