[Help!] Thinking about T-shirt affiliation

I'm thinking to start t-shirt affiliation using IG/social platforms. Please enlighten me with some suggestions or please answer following questions!

1. Which T-shirt store is good to start with?

2. Is Instagram good to go for t-shirt marketing?

3. What things should I consider before starting?

4. I don't have a specific niche so should I do keyword research at first?

Please help someone!

Can you define tshirt affiliation? Are you saying you're going to collaborate with artists to market their designs on your tshirts? Or something different?

wpsokw said:

Can you define tshirt affiliation? Are you saying you're going to collaborate with artists to market their designs on your tshirts? Or something different?

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yes, you got it. Can you please help?

How many tshirt designers you need?