i want to start a blog by providing domains for others ... but i do not know too much about this field .. i really need your help plz ....
All I can suggest is read, read, and read the threads in this forum, there is a wealth of free information available that will at least get you started in the right direction. Your question has endless answers and cannot be covered in just one thread!. good luck.
I do agree with mosilager, besides go through the different major registrars such as GoDaddy, Dynadot, Name.com, Namecheap, etc. Read about services they offer, pricing, available extension, etc. etc. and write a review exposing this information to start with.
Reading threads in a different kinds of forums is a good way to get knowledge about different fields.because its a good place to gain knowledge from experts
Domain forums like dnforum.com / namepros.com and domain journals like domainnews.com and dnjournal.com
To learn about domains,get kneoledge from dnforum.com,namepros,domainnew.com and ofcourse digigalpoint.Read,gather knowledge and then you will have all information about domains and then you can start blog by providing domains to others