Open up audio for the riff and follow the tabs. Open the song that you're covering in another window on your internet browser. Play through the song and trace the chords and notes with the tab that you looked up. Try to follow the numbers on the tab with the notes that are being played in the song. Try to get an understanding for which chords the artist is playing before trying to duplicating it.
One other cool thing about electric guitars– you can plug them into your computer and use a program like Apple’s Garageband as an amplifier. You can basically have 100’s of classic sounds available virtually. You can “jam” virtually with your computer and create full-on recordings on your laptop. You’ll just need a “pre-amp,” which is a device that amplifies the signal from your guitar before it sends it to your computer. I’d recommend something like the Focusrite Scarlett
Start playing the different notes and hold the different shapes. Once you have a basic understanding of how the notes are played throughout the song, you can start to hold each of the chords. If the song consists of chords that you're used to playing, it will make the process easier. If the song uses different chords, it may take some time and adjustment to get used to them. Practice the chords separately if they are unfamiliar to you.
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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. 
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