One of the best site for this called it has a lot of blogs and sources for all this and another good resource is by this person called harmj0y (Expert Guy)

Courses and Certifications

Pentester Academy - Attacking and Defending Active Directory [Costs : 249$-500$]

Pentester Academy - Red Team Lab This much more advanced btw

[ Costs 370$-750$ ]

eLearnSecurity - PTX - Very Very Pricy My Brotha