If this is you first blogging experience, then it is best if you use a free hosting service rather than getting things complicated and you will be able to learn better as well. If you are familiar with the technicalities, you can go ahead and experiment on your own as well. You will also save a lot of money.
Once you have your blog ready, make sure you update it on a regular basis. The whole idea of blogging is to allow people to share their views. Moreover, your blog looks fresh and new everyday with something exciting for the readers, and they will come back for more.
One more important blogging factor is to make it search engine friendly. It is important that customers actually find your blog when they are searching for a similar product. Make sure you do not go about writing long stories in your blog. Short and sweet needs to be your base line, as this is what will allow customers to see your point and enable you to make money online.
Remember, making your blog the best cannot happen in a day. It needs time and you need a lot of patience to develop it. If you like writing and want an online web presence, this is just your tool. So, what are you waiting for, go ahead and take those first steps!