That is a good start but a true fitter will actually be able to see you and help adjust your position in real time. The internet is a cool place but unless you have a robot that can adjust you, your cleats and your bike it won't do you a whole lot here.
I know people think you have to race or be a fancy biker (whatever that is) to get fit but anyone who rides a bike more than once or twice a year should go for a fit because it can be quite a great change and make you happier and more comfortable on the bike. Certainly you can make a lot of tweaks yourself and get you closer but a fitter can make a lot of small changes that can have a big impact. After my fit I felt really great and my cleat position was off by quite a bit and certain other things were off and it really helped me.