Not at the moment but I'm looking into the t-shirt thing.

Size is 9x9 inches. The prints are done well. The paper has a little bit of a sheen to it, kind of satin but not overly glossy.

Selling some prints of my bitcoin artwork:

https://www.etsy.com/listing/171426436/bitcoin

To buy with BTC, just checkout with 'Other' as the payment method and then message me for my bitcoin addy.

I agree. One of the easiest ways to get started is to setup a wallet and then buy some BTC from a friend and have him send it to you. If you don't know anyone, coinbase is a decent option but they require a lot of personal information and waiting period to get verified. Localbitcoins would be another alternative worth looking into.