- if you wanna improvise, learn some basic scales ( you really only need major, minor and pentatonic but you can learn some others too )
- if you wanna get more comfortable, practise different ways of holding your pick, different strap lengths if you play standing and practise going through the chromatic scale with each finger ( yes including your pinky finger even though it's annoying it's very helpful )
- if you wanna play barre chords, it's all about your hand positioning. watch videos and make sure you play mainly on the tips of your fingers ^^
- play along with the track + videos !! videos with the track, someone playing the song on guitar and the tab all in one can be extremely helpful, especially because you can slow it down if you're using youtube. never feel ashamed for playing slowly, get used to the songs you're playing !
- at the end of the day, you can just play the instrument. if you're not interested in theory or scales, they're really not needed to play well, at least at an early stage.