is there a free pack of props to use? , or a guide to create props? Im new at UE4 
It depends on what exactly you want 
You can find many free assets in the learn tab of the launcher + + www.blendswap
Wow thanks , i never visited the learn tab cause i watch tutorials. Im new at UE4 and im trying to learn how to make a good level , specially a jungle level or a level with vegetation on it,
Hmm, you wont find many jungle assets on the sites that I posted -> make sure to take a look at some low poly vegetation modelling tutorials or some speedtree tutorials