generally if i see shit like "i love (so and so)" fuck that shit go right over it. because you said your new i would only go over a section that is like that if there is one, dont fuck with the throwies and hand tags until you know for sure you can burn the shit your going over, and even then im not saying go fuck with everyones shit.
plus, id just do some throw ups and handstyles, because if you take a bunch of room your just gunna end up with a piece that says "i love jane" right in the middle of it in a week
just buff it all down...as if you give a fuck about other peoples graf newae...besides..no1 will even think that a graffiti vandal would buff out graffiti..no one will knw it was you.who gives a fuck buff it then paint it..i do it all the time
If you're new to graff and you see a wall all done up you don't wanna buff it just to put a toy piece or throw, I mean since you are new to graffiti. Just paint your piece or throw over it simple as that. If it comes out wack atleast it was practice and someone will surely go over it.