Oggi, vado al giardino del centro del rifiuti. Ho bisogno di tagliare una rosa grande e di raccogliere molte buste di plastica e molti pezzi di carta. Ma è una giorno buono bella giornata e mi diverto.

Comment: Should you need to prune a rose. Devo/Voglio potare una rosa grande. In case you refer to the rose tree the Italian word is "roseto"

Wombling (http://www.urbandictionary.com/define.php?term=Wombling)

in Italian: Raccattare tra i rifiuti

I hope this helps

Wombling

Really good job!  that is not a big mistake, actually is just better to say it without "ma" that means "but" so it gives a sense of negativity in this case, for the rest it is going to be " its a beutiful day" because you are talking about today and " mi divertiro'" is in the future form because the action has to happen. You know a lot, i am surprised! Keep learning...

Buona giornata

Wombling

Good job! add me on skype  : luca.cutrignelli95