My advice would be a bit different to the above.
I'd say not to buy a headset while training. Use the schools headsets for the moment.
Then when you qualify see how you feel about your intentions in the longer term. A lot of people give up very soon after getting their PPL. If, at that time, you are sure that you will continue flying for a long time, then buy the best headset that you can afford.
That's what I did 13 years ago. I bought what was a top of the range DC ANR headset then (cost me a lot of money) but I still use it. It's still very good, and still looks brand new.
Buy cheap and you'll buy twice.
Buy too soon, and you might end up giving up earlier than you think, and have an expensive headset which isn't much use for anything else.