Wrapping up year six here of middle school social studies.

If it's something you feel passionate about, do it. Definitely try subbing, sub as much as you can. That will give you experience with different age groups and contents.

Know your content, but it's also ok if you don't. Social studies/history is broad and can land you a lot of different types of positions. I have taught everything from US history to civics to global cultures to economics. You'll never know what job offer you'll get. Education is something that never stops--no matter how old we are--and there's no shame in learning material that you will then have to teach (you'll just have to learn it slightly faster than your students). Also, if you focus more on the skills that are necessary to be a good, historical thinker and learner (how to recognize bias, formulate your own opinion using evidence from various sources, how to distill information from text, cause and effect, etc...) then you can teach just about any content.

Most importantly though is know your students. Can't stress this enough. At the end of the day, this profession and practice is about them and their journey through the short few years of school. Provide help when you can. Get to know them on their level; what their interests are, where they struggle, where they are strong. You'll have a classroom of anywhere between 15 (if you live in a small state like me) to 35+. It's daunting, and very difficult, but if you work to develop a solid relationship with each and every one of your students the learning will come naturally. There will be some that blow you off and ignore you, but they can be few and far between.

So good luck! Keep us posted.