Welcome to Fiverr and the Fiverr Forum! Your gigs look fine to me, although I’m not that well-versed in your field, so I wouldn’t really know.
There’s really no right way to “getting orders”, really. Be patient and use the time to better yourself in your field, maybe think of other related gigs you could open for more opportunities. Read up on popular “how-to” and tips topics around the Forum and use what you learn to adjust stuff in your gig and your profile.
A lot of people always suggest using the Buyer Request feature, but I’ve recently reached Level One Seller without ever doing so, so that just goes to show how “success” on Fiverr varies per seller and their respective fields.
Wishing you all the best! Be patient. That first order is the hardest obstacle, and once you’re done with that, it gets a tad easier as you go.