You can delete any gig if it has got no order for 1 month or more.
If your gig haven't got order yet then update the information or keywords or any images and publish it again with more good presentation.
Try to give 7 gigs at first then estimate the possibility of which gig is getting order and which to keep or delete. You will get to understand how to showcase your creativity in your gig.
Publish your gig again but update it within 3 days after publishing, but do not update anything in your gig after 3 days.
Thanks.