To get good touch in your strumming hand, it’ll take longer than 10 hours. It’s about reps. Try to consider the amount of finesse you are hitting the strings with. Do a little research on palm mutting and other useful strumming techniques. If it sounds nasty at first, that’s cool. Your fingers and wrists will start to adjust. Focus on getting quality sounds out of the guitar.
Learn how to transition to different chords. One way to become proficient quickly is to learn how to transition between the various chords quickly. These transition periods are often the hardest for beginners to play when they are starting off. The more you practice between switching to different chords, however, the better you'll get at doing it in songs. Practice switching between open chords like G, A, E, and C. 
Try out different strumming patterns and rhythms. Once you're able to produce a good sounding chord, try strumming it at different tempos and rhythms. Rhythm is based on your strumming pattern, and how long you're holding your notes. Try a basic 1-2-3-4 beat, otherwise known as a 4/4. The number on the top represents how many beats there are in the measure. Try strumming up and down in different progressions to create a different sound for your rhythm. Once you get a basic rhythm down, you can start to incorporate quicker or slower strumming.
While there are in fact a number of songs you can play with simply the Em and Am chords, I know you're going to want a little bit more than just that. If you're still working on those first two chords, that's okay, they might take a bit to get comfortable with. Bookmark this page, work on the chords for a bit, and come back when you're ready for a few more. I'll still be here!
Use tabs instead of sheet music. If you don't already know how to read music, it can take a lot of time to memorize and proficiently read sheet music. Tabs are an easier and more intuitive way to write music for beginners that doesn't require any formal education. Tabs will simply tell you where to put your fingers on a fret board and how to generally play a song.
Strum with loose, relaxed motion. Strumming consists of downstrokes and upstrokes in various combinations, striking all the notes of the chord evenly and rhythmically. Use your wrist to practice smooth up and down motions. Keep your elbow in tight towards the guitar and sweep the pick down all the strings. Your elbow should not move very much, as you strum mostly from the wrist.
Start off figuring out what style you are looking for. Is it acoustic or electric? What music styles are you looking for? From country and bluegrass all the way to heavy metal and rock, there are so many different styles of guitar music. If you are just starting out and are not sure what to begin with, this is okay. Some instructors are very good at teaching beginners and helping them find out what they are passionate and good at. If you do know what you are interested in, the best thing to do is to find an instructor that teaches that style. On Lessons.com you can do this by reading through the teacher’s description.
Practice at least 20 minutes 6 days a week. Consistent practice will allow you to improve your guitar playing skills over a short period. Taking long breaks and not staying dedicated will wear away your muscle memory and delay the development of your skills. Instead, dedicate 20 minutes to an hour of practice throughout most of the week. During practice, you can either run different drills or you can try covering a song.
Learning guitar is a lot easier when you have a step-by-step system to follow. Guitar Tricks lessons are interconnected and organized to get slightly harder as you progress. You watch a video lesson, play along, and then click a “Next” button to go to the next lesson. Lessons have multiple camera angles, guitar tabs, jam tracks and everything else you need to learn.