depending on where you came from, you must first create your local bitcoin exchange account. then you deposit your bitcoin first in the deposit option. then you select the exchange according to your currency, if you already do it means you can withdraw into your bank account. if you can not withdraw, you may have to verify your identity data and your bank account first before making a withdrawal.
Good thing it's easy to convert bitcoin here in our country because our btc wallet support direct cash out of bitcoins to cold cash thru bank accounts or money remittance. But Im still newbie does localbitcoins support any currency and bank transfer? Maybe btc price there is much decent than what our wallet offers.