During Phase 1, you'll need to lock your BTC, for which you'll earn points:
Total limit for Phase 1: 1000 BTC
Minimum stake amount: 0.005 BTC (around $300)
Maximum stake amount: 0.05 BTC (around $3000)
Withdrawal will be possible within 7 days.
Download a BTC wallet if you don't have one Fund your wallet with the planned amount (min 0.005, max 0.05 BTC) + add extra BTC for gas fees, around $60-$100. There will be a lot of demand, so be prepared to spend a few dozen dollars on gas.