@Latraxstar720, I would not be looking at buying an iron from Home Depot. It is more preferable to have an adjustable temp controlled iron which you can find many of on Amazon for around 20$. Don’t get me wrong, if you have skill at soldering you could get away with using a non temp controlled iron but you will get the best results and less chance of damaging the delicate pads and traces found on these PCB. https://www.amazon.com/Soldering-VicTsing-Adjustable-Temperature-Different/dp/B01JACYTUU/ref=sr_1_2?s=hi&ie=UTF8&qid=1475504760&sr=1-2-spons&keywords=soldering+iron&psc=1
There are many temp controlled irons available on Amazon and that is just one for an example. Besides the temp control you also get interchangeable tips which you will want because the large conical tip that the ones in the hardware store come with are too big and clumsy for working on tiny stuff. Like @JTR says, I use a small 1.5mm wide beveled chisel tip for almost all the work I do.
Besides the iron, also having the correct solder and flux make a huge difference in how easily you can solder something as well as the final result of that soldering. No clean solder flux in a syringe is your friend! Use flux whenever you solder and it will make the process much less difficult and you want a very small diameter 63/37 solder with rosin core. I use a .33mm diameter for all the work I do or .0129 inch diameter. Prep the surface you plan to solder by first cleaning with isopropyl 91% alcohol and a Q-tip, I usually only do this for PCB not wires or components. Apply flux to the pads or through holes, tin wires or legs of the components and solder away.
Temperature is important and you want to only heat the work enough to get the solder to flow. Too high, you’ll lift pads and traces or burn the board, too low and you get “cold” solder joints which does not make a sound electrical connection. You cannot trust that the temperature the iron is displaying is always correct and the best way to find a good temperature to run them is to experiment. Start low like 500 degrees F and tin some wires or practice on something broke, when the iron is just right it should melt the solder wire right away and you should be able to make most soldering joints within a few seconds. If you have to hold the iron on a connection for more than say 5-10 seconds then you need a little more heat. My iron stays right at about 570-600 F but I also know that that is not accurate from testing with a temp sensor. Above I stated that I was using 650-675F that temperature is a little too high and over the past year I have adjusted that down. I recall lifting a few pads from some Vtx while building FPV gear and so have made adjustments since then. If you look at the data sheets for the 63/37 solder you will see that the melting point of that type of solder is around 360 F. If that is the melting point then you need to set the iron a bit higher in order to be able to melt it quickly, the tip of the iron may not be the temperature that you see displayed and there are other factors that would affect the accuracy of that reading.
Have a look on YouTube if you need a little more help, there are lots of great video on how to solder. Besides that, practice makes perfect and there is no better way to learn than by just doing it Have fun!