If someone is still using a 32 bit cpu he should throw the machine in a dumpster. All cpus made after 2004 by Intel and AMD are 64 bit. That said, having 8 GB ram on 32 bit Windows is a waste.
Unity is absolutely horrible for wannabe programmers. If all you're doing is showing images and videos then your best option is Renpy. If you don't know what you're doing Unity will drain all your memory, put your CPU on 100% and then crash. I've seen some amazing games made on Unity and a ton of bad ones, worst cases are even unplayable on a weaker laptop.