Creating T-shirt prints

Good afternoon, job seekers!

I have a fitness blog on YouTube and want to start producing my T-shirts with various themed bodybuilding and fitness prints.

I want to find a professional who is familiar with this topic and has experience in developing similar prints on T-shirts.

I need a serious and responsible person with experience for long-term and fruitful work.

The main selection criterion:
- understanding what I need in half-word,
Always be available online and respond to calls and letters promptly
Have a portfolio and good reviews,
- to know my subject,
- adequate price,
- flexibility and adequacy,
- a commitment to long-term cooperation and perspective.

The attached files include an example of the execution I want to receive as a result.