design T-shirts

I would like to design a T-Shirt for my social media influencers while they are streaming with my store logo,
and I was thinking if there is some way to make these unique to each influencer?

Please find links to their social media accounts below:

WakoBako: https://www.instagram.com/wakobako_pokemon/

MtKillaMongiello: https://www.youtube.com/c/MtKillaMongiello/featured

I would like to use Visaprint to do the printing, though someone is looking up other options for me and this may change.

I would like the shirt to have front and back designs, but from what I can tell, this might be difficult do to for printing.

I would like you to design two different graphics to print on a t-shirt.
I would like these graphics to incorporate the store logo and the logos of two of my social media influencers.
These are the two people in the links I sent you.