Step 1.
Go to Keplr -> settings -> turn on "Developer mode"
Then go to chains, select Neutron chain and save your "Neutron" address.
Step 2.
Go back to Cosmos Hub chain and at the bottom find the button "IBC transfer".
Click on it and then click "add IBC transfer channel"
Step 3.
Select Neutron as destionation channel ID is: channel-569
Click "Save" and then paste your Neutron address under "recipient".
Then, send about 0.1 ATOM and sign transaction.
Step 4.
Go to https://launch.neutron.org/ and connect wallet
You will see the airdrop section and the amount of tokens you will get
Step 5.
Claim tokens and once the Keplr pop up opens to sign the transaction you will be required to pay a fee.
Since you don't have NTRN tokens you will have to pay a fee with ATOM.
At the bottom of Keplr pop-up you will see "advanced" button, where you can change fee to be paid in ATOM instead of NTRN.
Step 6.
Thats it, you will get tokens after 3months, since they are vested.