It is not recommended to bring in soil from out doors because of bug problems, when that soil is used outside, there are natural predators that regulate allot of infestations, but in doors you can have problems right off of the bat.
There are ways to use out side soil inside, but then you still have to choose the right kind of soil and then sanitize it, seems like allot of work when you can just go and get a bag of decent soil for 15, 20 bucks.
I like Black Gold Organic, it is sold at most garden stores.
Adieu