What platforms should I use?

Play around on the following platforms and get accustomed to how they operate. Bit by bit, you will start having preferences and find yourself sticking to certain programs on those platforms.

Platform name Website
HackerOne https://www.hackerone.com/
Bugcrowd https://www.bugcrowd.com/
Synack https://www.synack.com/
Cobalt.io https://cobalt.io/
Bounty Factory https://bountyfactory.io/en/index.html
intigriti https://www.intigriti.com/public/
Zerocopter https://www.zerocopter.com/
Hacktrophy https://hacktrophy.com/