Install 32 bit 2 times

Yes if your processor is 64 bit If the processor is 32 bit you can't change

When you install windows it makes you choose, 32, 64, 82 Note that 82 means 32 I thought it was higher bit and got tricked

what is ur currently running os? if its win10 u can check it in the setting it will directly tell u. And depends on ur processor if ur processor is above core 2 (and with some exception u can install it on core 2 processor), and u have at least 2GB ram u r safe to install. google the specification of x64 processor

Just install a 64 bit windows