I haven't heard anybody mention ear and eye protection. They probably assumed you already knew this, but just in case.....
Get some good quality foam earplugs, AND good quality over-the-head ear muffs. They are rated by "db" reduction. The bigger the number, the better. I wear both plugs and muffs when shooting at the indoor ranges. You don't need the electronic muffs right now.
Get some good quality eye protection. I have had many empty cases fly right back and hit my glasses.

You don't need to spend a fortune on ear and eye pro, but get a step up from the cheapie junk. It is money well-spent.