Don't worry about it Dandin, everyone has to start at some point. Nobody just starts out with top gear, although some people can't help their snobby attitudes.
To reiterate what everyone else has said, breaking branches isn't illegal in Niff, but we do have some failsafes in case people can't kill them, mvp's summoned by bloody branches, will disappear in a few hours, so if a monster there is giving you issue, take a break, go hang out with some friends for a bit, come back later.
To identify the difference between bloody branches, and dead branches, Bloody branches will summon mvp's, where as dead branches will summon normal monsters (and some mini bosses).
And to correct someone earlier in the topic... Niff is actually the first map of skellington, not the last, it's nif_fild01, then the map over is 02, then niffleheim itself.