In my 25 years of being a CFII, My observations are that the sooner you get the monkey off your back (the written) you can concentrate more on the rating.
I've seen many people continue to work on the flying part only to paint themselves in a corner by having to study for the written then reduce their flight training significantly enough to loose the edge for the check ride. I also recommend the first 10 hours to be done in a simulator or an FTD , AATD such as a Redbird Flight training device (sim) With a CFII to learn all of the basics in. Lastly, transition to the aircraft until proficient and take your ride! Have fun and good luck!