tabs are easy mcpeasy man, the numbers tell you which fret to put your finger on, now trying to figure out guitar sheet music theres a real pain in the ass.
im shit at guitar but heres some advice. make sure your thumb is behind your fingers on the neck, less strain. dont push too hard with your thumb on the back trying to hold frets down, i did this and my thumb was fucked for like a year, totally sucked. also make sure you strum around the sound hole.
like the other anon said learn some easy chords that like every song has, practice changing chords slowly and smoothly before trying to speed stuff up, its hard learning instruments since it takes a while to learn all the shit before you can sound even sorta good. if you just wanna sing then you probs wont even need tabs just chords.
my previous guitar teachers have all recommended buying from music shops since shitty cheap guitars can have the strings too high on the fretboard and then you gotta work extra hard to push them down.
wash your hands before playing so theres no buildup on the strings then some hand and finger exercises so youre warmed up and its easier to play. fretting with left hand strumming with right, when people talk about numbered strings its like looking down at your guitar so for example the 1st string is the nylon string furthest away from you and the 6th string is the metal string closest to you