Me and my girlfriend usually stream to Twitch. Your internet totally seems fine. If you use tools such as Open Broadcaster Software, it shows you the bandwidth it uses on the right bottom corner, with a colored square next to it. I stream 1080p 30fps, and it averages around 3500 kb/s, aka 3.5 Mb/s.
If there is no one else uploading big files in your house, you should be good.
(reference for Open Broadcaster Software)