Here are some beginner resources for you:
https://yoirtuts.com/index.php?title=Hacking_TEAM_Hack
https://yoirtuts.com/index.php?title=Finfischer_Hack
https://github.com/ctfs/write-ups-2014
https://github.com/ctfs/write-ups-2015
https://www.owasp.org/images/1/19/OTGv4.pdf
https://forum.bugcrowd.com/t/level-2017-discussion-jason-haddix-bug-hunters-methodology-v2/3048

Tools:
https://blackarch.org/tools.html
https://github.com/danielmiessler/blackhat-arsenal-tools