The percentage is not so important. Better to focus ion really important things. Try just to study bronze articles about this and understand how to react in different spots on flop.
Try to understand when is time for pot control/pot protection.
I think that for now all u need is not just read, but UNDERSTAND bronze articles. With understanding of those i think u will beat NL2 easily.
Be aware so called bed beats. Many threads are around of people with low statuses and they complain that sites are rigged that they have no luck that to many people are bad players and they cannot play. With understanding bronze articles i am sure u are going to understand that poker is not against you and that you have to loose some hands. U are going to understand also that your graph doesn't really show your leaks because it is maybe caused just baconer of variance.
Just try to study study and study and of course don't forget about posting your hands if you have any doubts about your play(even if u win hand this not necessarily mean that u played well it).
IOf course i wish u all good luck at the tables.