Blogger is great for the new/casual blogger that is not wanting to grow, or evolve into something bigger.
You can do a lot with blogger pretty easily. But if you want to grow, evolve, and join the rest of the bloggers in this century, I would suggest starting with WordPress, or even look into moving to WordPress as soon as you can.
You don't have to get a self hosted one instantly. Id suggest starting with the wp.com version just to get used to how the system works (posting/images/themes), then once you think you are ready and understand it I'd look into finding a good hosting company that offers support on WordPress (installing, customization, support) and jump on the boat and get to it.
Once on the self hosted (wordpress.org) you now have full control over your blog, and all its features. This opens up the option for plugins, fully customizable themes, and much more.
But it is up to you to make the plunge to do it. You can do anything you put your mind to.
Also, don't be afraid to ask questions, search google, or just play around and figure things out for yourself.
The internet is a never ending knowledgeable, USE IT!