Hello again Jeffery: I too noticed right away that your guitar is out of tune, but of greater concern IMHO is that buzzing open string which has to be an annoyance to you. How can you possibly play cleanly when a string you aren't even touching buzzes? Without seeing your instrument up close I cannot offer any definitive answers, and a very brief google search had the first link telling us to adjust the truss rod. You will go crazy looking for a truss rod as your guitar almost certainly doesn't have one. If your neck is warped, while in theory it can be fixed in practice you may want to start saving up for a new instrument, but it could be as simple a case as the nut being filed too deeply on that string. My first guitar had that issue and if memory serves I just wedged a bit of paper into the groove which raised the string and voila, no more buzzing. You should probably do a proper internet search to first of all help you identify the cause and secondly to give better direction as to how to remedy the situation. You can only ever be as good as your instrument so you will want to do what you can with what you have. As an aside, my first guitar really held my progress back. I hope your fixes are easy ones, but as you progress you should stop by the occasional guitar shop and take a gander at a variety of instruments (but only after educating yourself as to what to look for). It doesn't hurt to know what your options are or how to evaluate a potential future purchase just in case you are dealing with something serious such as a warped neck. It also sounds like some of your strings might be quite old, though that could just be my imagination.
As for your playing, you are doing great. Keep up the good work.
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"The biggest room in the world is the room for improvement." — unknown