If you get along to 1kea or somewhere similar they sell 5 packs of wooden hangers - I would suggest 3 or 4 packs. They will last and you will not have to buy any for a long time.
Think on this and remember it when you arrive: Your locker gets inspected "for hygiene". The less stuff you have in your locker the better becasue you are not jamming things in and pushing stuff into corners where it will be found by one of the inspecting Corporals who will then have a field day with you. We twigged onto this pretty quickly and relegated our civvy clothes to our suitcases in the suitcase storage room. Uniform items were hung up in a neat military manner, two token hangers of civvy clothing were on display as was one pair of civvy trainers, and shoes along with civvy socks and underpants. Less hassle to keep orderly, less on display, less likelihood of being picked up on an inspection. The staff twigged onto our little scheme and we caught wind of a suticase room inspection so we moved our civvy stuff to our cars in the car park.
Good luck.