As I siad before every 'courses' and 'gurus' are useless as they wouldn't say you nothing which is working.
1. What budget are you setting to the campaign ?
1-1-5 is your structure , right?
2. 50 campaigns is nothing while you are searching for offer with high payout
3. So from 50 campaigns - what roi's you was having ? I am asking about 1,2,3,4 day
4. how you make decisions on stopping/continue running your camp?
5. Try to test your skills with tier 3 geos, don't go with usa , canada... they are too expensive if you don't know if offer is good and payout is high
6. ONLY BROAD TARGETING
7. I have launched 120 campaigns in last 18 days and my ROI is positive. So I think you should make bigger volume with your campaings and tests