Hi Diannery,
Congratulations on your excellent 5:2 start.
I lost my excess weight on the old 5:2 but now do the 800 max for maintenance. You should still lose weight eating 800 calories of fast days, but it might be a little slower. Make it easy and sustainable for yourself as that will mean you can keep going. 800 is the max, so you don’t have to eat all the calories if you don’t need to. Good luck with it.