Indoor gardens may not be suitable for everyone however the vast majority of people can definitely benefit from it especially so if they have an idea about how best they could materialize things for themselves. If you have an idea about gardening in general and if you have specific substances that you would like to grow indoors then setting up an indoor garden might just be the right thing for you to do however you can always go for a grow set and dedicate a much smaller space for such a purpose.
It would all depend entirely upon what you're planning to grow so the amount of space that you would require would obviously be dictated by what it is that you intend to grow. So, apart from having to look up information online about how an indoor garden works and what substances can be actually grown indoors, you would want to start looking for tools and accessories together with complete grow sets and packages that you could purchase to get started right away.
You may want to check out what Jimmy Greens has to say with regards to going for grow sets as well as grow tents for your indoor gardens. Even if you have a bit of experience in growing substances, you will still be able to benefit from some of the resources available online.