I think these forwarder things work with the original r4 card too.it is the best option, it's easy, and it's free compared to 3DS flash carts which are expensive and give you less features.
depends which one you get. for the DSTT I mentioned, you can set up forwarders to have DS games on your home menu.
Anything else I need to get started with CFW? If I pick up a 32gb SD and the r4 card I should be able good to get started?