Long story shortt-shizzy screenprinting is better than transfer paper, it does not crack like many transfer paper will do and the life is alot longer if not permenant from screenprinting. If your starting off and have some designs for now id advise you to print onto the transfer paper for now press it yourself at home and test your audience see what they thing of your designs if all goes well take it further and start screenprinting to offer better results and quality and build your brand from there
