Leiopython

Hello. I am new to trucks so I do not have a lot of knowledge about them. I am creating a membership to gain some knowledge. If I can be honest, I am in the market for a used pick up and am undecided between makes and models or what to look for. I am not in immediate need of it, looking to purchasing within the next 6 months but want to research and learn before purchasing. I am looking to use this truck as a family vehicle, so reliability is a must. I would put my budget at $16k. Any advice anyone here can give as to what to look for (makes, models, mileage etc...) would be greatly appreciated. I prefer a bigger cab since I have two younger children and two dogs I will occasionally be transporting. Thanks for any help and advice anyone can give.