Welcome in the community! 
Here you can find more content:
:///index.cfm?referral=fref&m=eAut&pos=1t1&k=turbosquid&gclid=CI-lkK2htsACFZTLtAodLT4A9A
://www.blendswap/
But keep in mind that it is not “engine ready” -> e.g missing lightmap, too high poly,…