One more thing... because of your digital background you will miss "chimping" as a way to learn from your mistakes. The only alternative in LF is to use instant films. Polaroids are discontinued, but luckily Fuji makes very high quality instant films that will allow you to understand better exposures.
there are two formats of instant films:
FP-100C45 (which is - as you have guessed - 4x5)
FP-100C(which is about 3.25x4.25)
I strongly suggest to go for the smaller backs that load the smaller Fuji 100C. Each sheet cost less than a dollar while the slightly larger 4x5 ones cost almost 3 dollars each.
I went this route after making a couple of mistakes buying the wrong backs. Try to get a used Polaroid 405 on evilBay or from KEH.com (the best customer service you can get from an online store of photography gear)
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