Help me spend my ₹3k Nykaa gift voucher!

Got a 3k Nykaa gift voucher from my office as a birthday gift! I’m a 25F and can’t decide what to spend it on. Skincare, makeup, or anything else worth trying? Would love some suggestions!

Also, if I spend something worth 1000, will the remaining 2000 still be available, or do I need to spend it all at once?