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how to make 5v from 2 smaller power sources?/Or bump it from 3.7v to 5v? Is there a way to make the 3.7 into 5v (amp it up) or is there a way to add two different power sources into one so they add together?

When you put a set of batteries in parallel (wired so the + sides are together and the - sides are likewise together on the other side) the voltage of the batteries are added together as an example 1.5 + 1.5 = 3.0 volts. When you put a set of batteries in series putting one batts + side to the others - side and the free ends are wired to the device the voltage stays the same, but the available current increases (mAh) depending on the battery size. Is that what you’re looking for?