Good for you. If only everybody was exactly like you we'd all be in fantastic health. We aren't of course.With more time even if you are not into spending a lot of time cooking, this includes me, there is no reason to buy unhealthy microwave and oven ready meals rather than for example putting a chicken breast portion in the oven, grilling a pork chop, baking fish etc. Vegetables can be frozen and even potatoes out of a tin. Depending if your main meal is daytime or evening the second meal can be healthier too, not similar to a takeaway from Greggs, McDonalds etc.
If now burning less calories than 12 months ago balance that by eating smaller portions.
I'm not a gym person but now on days not at work unless the weather is awful all day get a least a half hour brisk walk around the estate, sometimes I take a larger loop to make it an hour. 12 months ago I might not leave the house all weekend.
Incidentally, plenty of oven and microwave meals are extremely healthy.