Firstly, go to MEW then click on Access My Wallet
Then select Hardware
Then select the kind of hardware wallet you use (in our case Ledger, but should be revelant for other)
Do not forget to open the pirl app in your Ledger
Then click on the arrow next to Ethereum to see all network available
Then select the Pirl network
Then choose your address, check ti accept Terms and tada !
Now you can proceed to claim guide