For beginners to cryptocurrency, in order to purchase Polar tokens from PancakeSwap it is necessary to set up your wallet on the blockchain. This can be done using a Metamask wallet which can be set up using the following instructions.
In order to initiate and pay for any blockchain transaction you need to have cryptocurrency in your wallet. For example ETH or ether is required to pay for transactions on the Ethereum blockchain. ON BSC, BNB is required and MATIC on Polygon.
To fund your wallet with cryptocurrency you may need to register with a CEX (centralised exchange) such as Binance to convert some fiat/normal currency to cryptocurrency. Then withdraw this cryptocurrency to your wallet held in Metamask.
Please be careful as you risk losing your cryptocurrency at each step.