I would recommend a Crave for fairway driver, and as for a putter i really like the soft electron Envy i just got, but i like my electron Ion too. Envy will be more versatile as a approach/midrange disc though, imo.. i know people use the ion for more than putting too its just a little too deep for me.
Crave will be a neutral flyer and help you work on any line you want to throw without being so fast that you cant get it up to speed. I prefer a Servo and Resistor combo because they can more easily be forehanded but a Crave is a better starter disc. After you master the Crave and can turn it over and shape lines with it, you could get a wrath or tesla (speed 9).. then when you feel you can get a full flight/distance out of a speed 9 disc, then a Photon (speed 11), etc.. But your right its best to start with slow speed driver until your arm speed increases. I can throw almost 500' and I really dont need anyhting faster than my photon, i have a mayhem but its not as reliable and really only gets me around 20' extra distance.
I don't use midrange discs, premium plastic putters are my "midrange" and if i need a little extra distance i go up to my slower fairway drivers (Resistor, Crave/Servo). Never found a scenario where i needed a midrange class disc because a putter like an envy in neutron will get me there with more control, i suggest trying to do this from the start.. but thats just my style/opinion. If you like midranges then the matrix would be a good start.
Putt with an electron Ion if you like straighter glide, if you like a bit more fade and you putt harder maybe an envy in like soft electron would be better, but i love my neutron envy for all midrange duties/approaches and shorter drives off the tee. You want to work on form then driving off the tee with a putter will quickly set you straight lol
Learn how to throw a putter with a fan grip, power grip for drivers, youtube some videos, feldberg has a good putting clinic, schusterick has a driving video, good luck man