If you are trying to learn to use WhatsApp for the first time as you have many friends who are using it but you may never have used an Android or an iOS based mobile device before and you have now decided to start using it then you will want to look for the right website where you could learn using Whatsapp correctly.
The best way to learn to use WhatsApp is by actually trying to download it then playing around with it as nothing beats learning through experience and if you depend upon tutorials and guidelines that provide you with tips and ideas on how WhatsApp works and expect to start using it some day then that is not really going to work for you.
Go ahead and download baixar whatsapp para android on your mobile device and start using it and if you get stuck somewhere through the process of putting it to use then go online to look for the specific answers to the questions that you may have. This way you will know exactly what type of information you should be looking for online as opposed to for example trying to put the right question on the internet expecting to have an answer for them. Without actually using whatsapp you would not know what it is all about in detail.