here I made the Fūinjutsu be divided into 10 levels
the first level and when you have a theoretical basis on the subject.
the second is when the person is able to do basic things like storage seals and explosion ticket
the third is when you can make stamps at a speed of three seconds or less
the four and when you can apply stamps on animals
the fifth is when you can apply them to human beings like Jinchuuriki and an example
the sixth is when you can make large-scale seals like barriers or matrices
the seventh is when you can make advanced seals and understand them but don't execute them
the eighth and when you can run advanced seals like the Consuming Seal of the Dead Demon
the ninth is when you can create or improve an advanced seal like minato that improved the seal of the flying thunder god
and the ten where only the uzumaki ancestor managed to get to and when you can just with a glance understand a seal and how to undo or improve it
'naruto is currently in the eighth stage but with the stress of having to run away and hiding he couldn't release all his power from now on he will be able to quickly increase his strength'