How necessary is construction knowledge?

[Account Closed]

I'm still very new to the idea of real estate investing, so I'm doing plenty of reading. I would really love to be a landlord by house hacking and eventually following the BRRRR strategy to gain more properties. How necessary is a knowledge of construction and similar trades (electric, plumbing, HVAC, etc)? I have always had a song interest in these subjects but have no idea how to start learning them.

I do have a family member who works directly underneath a contractor and could get me a job but I feel like my lack of knowledge would just slow down the team. 

In your experience, what knowledge should i pursue and what should I just learn as I go?