As the others mentioned, learn by breaking shit, just not your implants.
Cards are cheap and easy to replace, implants are not.
My suggestion would be to buy all your cards in one go rather than getting them in drips and drabs. That way you can expand your learning as you go without having to place new orders and wait for them, plus you’ll probably save money on postage.
i got both of mine from KSEC Since they are in convenient bundles, I didn’t have to search around.
Magic card bundle
FYI
Heres a couple of Flipper ones that may help