I want to do my gig marketing or what social media would be best to do gig marketing. Looking for expert advice.

[ganimia]

[designer_mkh]

You can use what ever social media you want. You just need to reach your target buyer.
By the way, the work category you choose has so many Competitors.

[facebookadski]

You can gig marketing on;

Facebook

Instagram

Reddit

Quora 

And also others Social sites

[kazimuhammad]

You can marketing your gig on Facebook Page, LinkedIn, Instagram & Twitter. These are most powerful social media platforms where you can marketing your gigs