Need expert Facebook Ads Strategy for drop shipping

Hello to my BlackHatWorld Family

I am having Instagram page & a website in the same nich - On the website i have a online store page and 50 Products on it. Fully setup.

1. I want to know is it better to advertise on FACEBOOK or INSTAGRAM or Both

2. I want to know expert ads strategy on budget, target, best keywords strategy

3. Any advise you want to share as per real time experience

Thank in advance to my BHW family, God Bless You All

are you specifically going for paid system?

Yes - because followers on my Instagram are really low - i want to try the paid.

If you know any free system - please let me know