Absolutely start with transfers and a heat press. Like RJ said there's a good thread on this from 1-2 weeks ago. Transfer Express is a good starting point, they will send you a nice package of sample transfers to press at your shop. This way, you get to see the difference between screen print, DTF, etc. There's a lot more info in that other post. There's a lot to learn with this, lots of fabrics, transfers, combinations, heat, light ink on dark shirts require a white backing...on and on.