I downloaded and installed a mod to forge, opened it with Minecraft java, and it showed that it was initialising mod(s). But then, there's no way that I can see to open a world with the mod. I went into options (on the title screen) and went into resource packs, and there was nothing there. But then I went into mods and there was stuff there.

Is that so... hmm... that's what I thought too, until I did open a new world and there were no new items in the creative inventory. Or maybe the mod I downloaded was whack - I don't know. I'll have a fiddle around with some different mods and I'll see how it goes. I can see clearly in the bottom left hand corner that the mod is installed, and that when I go into settings [on the title screen] it does show the mods downloaded from the modpack. I just want to reiterate though that there is nothing in the resource packs section. Thanks for your fast response!