
After some really quick checking i would say fastest safest way (to get permanent recedency) is probably study permit, look for work during studying with an employer open to up your hours once your studies are over. So you can get a work permit. And before you known it 4 years have passed you can apply for permanent residence. One more year then apply for citizenship.
Edit: since you said you were open to studying
Edit 2: you probably already knew all this. If so read this as someone trying support your decision rather than some rando on the interwebs over splaining.
Do you mean the 80% of mean salary thing, for permanent recedency? Self-support is probably a weird traslation. Self sufficient is probably the meaning. That you don’t need monetary support.