A tablature is easier to learn but it comes with some impediments: it is not as detailed as musical notations or sheets and it does not show time period between each note. As a beginner it will work, just buy a book and learn to read tablatures. Also make use of a good music forum to for tips and read music discussions.
Starting with a harder task will do nothing but reprieve your first success. A delayed success de-motivates the beginner and dilutes the passion to become a good guitarist. This also helps your fingers remember formations or notes that might be used in other songs.
Practicing to much doesn't mean you should keep the guitar in your hands and thrash its strings like a maniac. Always stay discerned about each and every chord and its minute details while listening or playing a song. The ability to learn quickly and being a keen observer will help you to learn playing guitar very quickly.
Your company directly affects your abilities, being with talented guitarists will increase your talent. You will learn their expert ways and ideas for playing guitar and you will rectify your mistakes expeditiously. If you are unable to find any, simply find a good music forum and read music discussions recurrently.