Download MetaMask (a crypto wallet in form of a browser extension) or TrustWallet (an app for your phone). After that, you will have to add the Binance Smart Chain to your network list. (Click here for a step-by-step tutorial)
Buy BNB on an exchange (i.e. Binance, Kraken, Coinbase etc.). Transfer the tokens to your MetaMask wallet address. BEP-20 addresses start with a "0x"
Click here to head on over to presale page or send bnb to this address 0xe48C980f2a21baAB7e40D5423815fF8C36f7CbaB, and tokens will be instantly transferred to your wallet.
Swap BNB for iBull. Now you need to add iBull to your MetaMask or Trust Wallet to view your $iBull. Lastly HODL!