Your gigs are not bad, indeed, but there are some things that should be addressed.
Your gig title is: "I will create an illustration and custom t-shirt design in one day." Check if your gig title and description are optimized for SEO, and if necessary, improve your gig tags (use all 5 of the available tags).
I also performed a reverse image search on the images used in your Fiverr gig. You should only use images that you own (and are not uploaded to any stock photo site), as there are two important reasons for this:
Customers won't be able to reverse search those images, indicating that they are genuinely custom designs - higher chance of orders.
Using images that you don't own can lead to serious legal issues, resulting in fines ranging from hundreds to hundreds of thousands of dollars.
Additionally, consider enhancing the descriptions for the different packages you offer. Using names like "gold," "platinum," and "out of the box design" may not be very appealing to potential buyers.
You should also change the images of your gig, because this is the first thing that the buyer will see and in my opinion it doesn't really look good.
On my device, your gig description lacks highlights or bold text. Please make the necessary adjustments to improve the presentation of your gig.