How important is for you to take Putter Fitting ?
There is a Putting Fitting service in my area costs about $100/session,
would you use this service?
You will be much more consistent if you get your putter fit to you, instead of conforming your technique to your putter.
Right now you are at a 14 handicap? I wouldn't spring for the "SAM Puttlab" or similar process at this point. In the future, yeah it can help alot, but right now just get the basic loft lie and length adjustments.
Also, most new putter purchases will include an indepth fitting.