What "account" are you referring to where I should store them?
Your NXT account or wallet, the simplest way to create one is to go to the 'web' wallet link in my signature.
Keep them in your NXT account or wallet for three months to get one Ardor for one NXT. If you move them before that you get less NXT. For example, if you move them out of your wallet in one and a half months you get half an Ardor for one NXT. Put all your coins in your wallet and don't move them for three months and you get the maximum Ardor you can get for them.
In the new Nxt Client (1.9.2) you can see how much Ardor you are getting realtime.
