The first thing you should do if you want to braid your hair properly is to remove tangles from your hair by using a wide-toothed comb. The idea is to make your hair to be knot-free so as to fasten the process. You can also apply a leave-in conditioner to your hair to make it moist, though you can braid with dry hair too.
After this, you will need to divide your hair into three parts. Start by holding the right part with your right hand, and do the same with the left hand, leaving the middle part. At this point, continue the process by crossing the left part of your hair over the middle part, after which you cross the right part of over the middle part.
After the first round, repeat the process again by first crossing the left part over the middle part, and then the right part over the middle part. Continue in this manner till the last round, where you will need to secure the braid with a non-rubber elastic material.