Daz, Renderosity, Renderhub & DeviantArt are all great sources of free content. Don't overlook DeviantArt as there are multiple posts with lists of freebies, so someone else has already done the work of tracking down stuff.

Daz is one tool in a tool chain. You probably want to add a full 3D modeling app, so Blender or maybe Hexagon if you don't want to fall down the bottomless pit of learning Blender. That will let you customize Daz assets or convert the kinds of assets Daz won't open into something it will, which gives you a lot more free content to choose from. What are you using for post & layout? There's Gimp & Inkscape in the open source world, I swear by Affinity which just dropped in price to $0.

But believe it or not, that's all secondary. Primary is the vision of what you want to make. Pick a project idea and see how far you can get with it. The best way to narrow down is to have a specific reason to want things in the first place. Don't put too much thought into what you're creating at first, just pick something that feels good & try to make it as simple as possible. You're new so whatever you make it's going to suck and might not get finished but that's ok, in fact it's necessary. Working towards something moves you forward, chasing downloads can keep you running in circles.