depends on what you mean by "get started".
If it's trading - you can plainly have wallets in exchanges directly. E.g. I decided to get rid of litecoin/rucoin clients totally - mined coins go to the exchanges directly (they go as transfers, not as "generated" - this is important). The truck may work with BTC as well - it depends on how pool does the payouts. If it's "normal transfers" - the approach may work, if it's "generated" - you definitely need a client.
BTC chain download is not the only problem. Crashing a PC with bitcoin client running can lead to database corruption=redownload. Size matters as well - it's rather expensive on SSD andyou never know how much you'll need tomorrow