Of course, like every crypto, is better if you download the wallet and store the funds on your pc (sync your peer downloading the blockchain). This way you strenghten the network.
you can download the wallet from here: https://nxt.org/download/
The network is POS, but once you sent the coin to your address, even if you turn off your pc, you'll still receive ardor on the 12th of October in a form of NXT asset.
Which wallet is it best to store NXT to get Ardor: the version 1.9.2 wallet, an online wallet, the lite wallet, the browser wallet, or a wallet on an exchange?
Does the wallet work like POS where you have to synch to get the 'snapshot' rewards?
How will you receive Ardor?
Will it be sent to your NXT wallet, or will you have to claim it from an exchange?
Will you have to create a separate wallet for Ardor?