I'd start with at least 1,000,000LDOGE ($82) - price is dirt cheap right now, if the price rises to 2 sat - you'll double your money. It'll likely rise when DOGE does next (but never guaranteed)

You'll need to download and run the wallet to stake

(EDIT - There is a risk on the coin as well - since you can't sell it immediately right now as price is 1 sat - so if you want to sell at 1, you have to join a queue of sell orders and wait a few days)