To show blog content in more user friendly environment you might need to add a scrollbar. But If you are not a web designer then it would be difficult for you. Good news is you can easily add custom scrollbar in WordPress blog by using Dewdrop Custom Scrollbar plugin. This plugin gives you oppurtunity to add a customizable, stylish & responsive scrollbar in your blog. You can easily change scrollbar color, width etc.
Here are the exclusive features of this plugin:
After installing the plugin you will find the menu in Settings > Dewdrop Scrollbar Options. In setting page first of all you need to set all the parameter like color, width, height, radius etc:
Here is the sample output of custom scrollbar generated by the plugin: