>>3100473shit advice. you don't get good at photography by not taking pictures. of course you shouldn't waste film on mindless shooting, but being too precious about it is a surefire way to develop a habit of hesitating and overanalysing.
also, whether something is 'worth it' is entirely subjective. most hobbies require at least some financial investment. OP got his camera for free, he could put ten rolls through it, sell it, and come out having lost nothing, learned a few things, and had a lot of fun in the process.
nice camera, OP. my advice is to pick up a book on 35mm photography from an op shop and study that, but in the meantime, trust your instincts, shoot what you enjoy, let your style refine itself and your camera handling skills improve gradually. shooting manual is hard at first. don't be disappointed if you take a lot of duds. one good photo per 36 exposures is a reasonable goal even for experienced photographers.