While I haven’t attended film school myself I feel that there are pros and cons. Most of the cons have to do with cost.
My suggestion would be that if you are set on going to a school and taking on the burden of the cost then you want to make sure this is indeed what you want to do with your life. Get some On Set experience. Not your own sets but on someone else’s set. Doesn’t matter what the job is just get in there and see what it’s like to be working with other creatives on something.
I’ve seen people pop onto a set and find that they just don’t work well with others or that they really don’t like working on things that they aren’t in full control over and they opt out. As filmmakers we aren’t always going to be the big kahuna. Filmmaking is a collaboration. It takes someone willing to bend to make things happen.
Good luck!