I saw it on my way into town, somebody put out a casio WK-3000 piano out on the curb for free, with the stand power cord and even manual. The craziest part is its fully functional. Not a darn thing wrong with it 'cept some dust. Now I have to learn piano.
It looks like the WK3000 is semi-weighted, so not really light as a synth action, but not a hammer weighted action like your Roland.
I find the Roland FP’s action to be a bit heavier than my teacher’s Yamaha upright, but lighter than my Rhodes. If you get your technique down playing a synth or semi-weighted action, if you do decide to get a hammer action or acoustic piano later on, your fingers won’t have the muscle and/or muscle memory to play on the heavier action.
I had somewhat the opposite issue when I started taking lessons, as I’d been playing the Rhodes for about a year or so, and I was pounding the heck out of the acoustic keys. I got it tuned up by Vintage Vibe and the action is better now but it is still heavier. The other issue I had to deal with was I learned the Rhodes keys are a hair skinnier than standard piano keys, so playing the Roland I got when the Rhodes went in the shop or my teacher’s piano, all of a sudden my fingers had to reach further for octaves.
I think OP’s find is tremendous for someone interested in trying piano/keyboard/MIDI, but if they do decide to stick with it, they would probably want to upgrade at that point.