First I must say I have a ways to go in Latin; I usually don’t answer posts but I feel comfortable answering this because I’ve been through it. I don’t remember exactly how long a day it took; I’ve tried now and again to maximize my time by blocking out an hour a day and reading all I could in that time, but that can leave you without a good stopping point and I’ve always regressed to marking out a set amount of text (they’re divided into shorter sections) and working through that in however much time it takes: sometimes longer, sometimes shorter. Don’t be afraid to experiment: after starting Greek a little over a year ago I struggled with how to read and to balance the two languages, and it took me until just the other week to figure it out (hopefully). You’ll find through experience and trial-and-error what habits work for you.
Others would probably know more. Check out horus92’s post here: