I need help better understanding PV, yield to maturity, coupon rate and maturity years. my course teaches how to find the answers via finance calculator, but I need a betterunderstanding of them individually

for example:

if PV is 102.32, coupon is 4.5 and maturity is 30 years, the financial calculation tells me that the yield to maturity (YTM) is 4.36.

what I do not understand is the detail behind these variables and how they relate to each other with regard to finding yield to maturity or any of the other variables