Whoa, 14 years old and getting excited at books? Makes me proud, keep bringing hope to your generation ^^
LotR is a great series but you'd have to have a strong affinity for fantasy I think. Game of Thrones is also pretty good but ridiculously adult, just giving you a heads-up :P Honestly that right there is a decent backlog. I dunno how many lighthearted stories I've read (I'm a fan of dark/dystopian novels) but if I think of any I'll definitely recommend them!
How about you? Got any books you really liked? I can appreciate soppy stories here and there haha