I don't have MATIC/BNB/ETH/AVAX/FTM for claiming. Where can I get some?
You can make use of a faucet which sends you some tokens for free.
To get MATIC, for example, the following faucet gives you some:
https://macncheese.finance/matic-polygon-mainnet-faucet.php
Otherwise, you can buy MATIC/BNB/ETH/AVAX/FTM on most decentralized and centralized exchanges.