Upon bringing her into Guilty Gear Xrd -SIGN-, Arc System Works toned down some of the execution barriers that existed for playing I-No at a higher level in previous games. That said, she still remains a rather technical character who requires some time and dedication to get good with.
Naotolololol recently put together a comprehensive, hour-long tutorial video for the rocking witch. The guide below covers most of the basics that players will need to play I-No, and includes helpful information on her normals, hit-confirms, and combos.
Source: Naotolololol