That's hard to know Clareymoo. I did so much research before the colour browse that maybe it would have bee an easier to go to browse earlier. They could give you some inspiration but if you don't make decisions easily 10 days before selection could be hard.
Our colour app was only a week later which was fine because I'd done so much homework. Having said that I made changes to colours a few days before contracts app.
We had 4 weeks between selections and colour which was a good amount of time as I made changes in between. But I remember you saying you were in no hurry so you could def push our appointments as you have time. Contract app are booked 4 weeks after tender at app.
Not sure I've been any help. You could always go to browse and then decide how you feel. Good luck!