It is fairly straightforward to create your own BLOG. There are many web based programs which will help you set up your own BLOG. These helper web sites either set up and create your BLOG site on their web server or on one that you specify.
The most popular one of these is BLOGGER. Click on the link and follow the onscreen instructions to create your own BLOG. There are others as well - the best way to find more information about them is to do an internet search using the terms "create your own blog".