My on demand t shirt website

Hi I want to open my on demand t shirt print service .
What I am looking for :
Création of 25 t shirt not big deal only text in the t shirts
Création of the website Shopify
Création of the on demand t shirt shop with printfull or similar
Size color price etc
The website need to be on my Www.Gilles.eu
I am not good in that kind of creation
Budget :150)