Give me a target by end of the year

Yes this is probably silly but here I am starting again.
I realised the key to losing weight is to not have a zillion celebrations during the initial stages. The 'oke bite won't harm' does not work for me.

I was doing well, only eating what I needed, allowing myself to breathe, cutitng out unhealthy food. But having so many celebrations and excuses to eat cake is silly, for me.

I don't celebrate Xmas so have no worries of tempting food for December.

I'm female, 5"4 and after kids and no exercise, around 75kg.

I don't care how small the weighloss, give me a realistic number to lose by the new year and maintain and I'll add it as my first goal. I need to be serious about this.