I started off with tabs and that didn’t help me much, I did better trying to mimic the songs I heard until I got my fingers to do with I wanted, then I moved on to tabs (having a better idea were “sounds” where,) then the tabs taught me notes, then I just parsed those over actual notes (and I used Cakewalk) and learned to write actual notes after that point.
I don’t play much anymore, not unless I need a bass track for a video or something I am working on. I play a fretless 6 string and I love picking the thing up when new people are over and start playing something like Linken Park, or even better, Metalocalypse! Most people don’t figure out it’s a bass until they look!
But as for what I recommend for you? Well, if you want to do really high, hard stuff, learn to stretch those fingers, cause most bass cords, if you want to call them that, are few and far apart. When I was 16 I had, (and still have,) girly hands, thus making it very hard to hit some notes.
But ya, in summery, (your 14 and probably don’t read the entire rant I put up) I would start with some tabs of you favorite songs, so you know what they should sound like, keep playing those till your finger bleeds, then move up from there to harder tabs. Most websites put the songs into categories, “Beginner, Intermediate, Hard, and Pro.” Have a look through those! I wish I still knew all my old sites, but I just looked and they are all ether porn now, or gone. Sorry.