I am doing it but like with my past attempts at 54 day rosary novenas, I get behind. Right now I am 4 rosaries behind. This is I think my 3rd or 4th Rosary novena and it’s way better than the first one I did, where I got something like 23 rosaries behind and had to make heroic efforts to catch up to the group by the end. I did something like 13 rosaries in one day to catch up with that one. There are also reflective prayers that go with them and though I completed all the rosaries, I did not finish all the reflective prayers until a month after the end date, at Thanksgiving.
I always ask God who is outside of human time to please move my prayers to the appropriate day.
As for time of day, say it any time. From my perspective if you’re just getting it said on the right day and not having to play catch up like me, you’re doing good.