Hope to see the polished product! Also I just realised I made a typo (I said "these kind of games are better with on handed controls" when I meant "one handed controls"). Good luck with polishing the game!
The late reply is understandable.
the walking part makes sense with two handed controls, it's more of the computer-sleep loop that could work with one hand better (easier way to close without esc, and not needing to move , then interact with the bed with e just to sleep)
this loops back to my suggestion about the 3d walking being the "side" gameplay while the computer-sleep loop is the "main" game.
but yeah there's no way around first person walking apart from some weird optional thing like using the mouse wheel as "cruise controls" to walk forward at a fixed speed since you can steer with the camera. Or something like numpad/numbers quick traveling to fixed POI's after unlocking them.
But being able to click as an alternative to 'e' (basically have alternate inputs for the same action) can help reduce the need for splitting the input between hands. Not asking to change controls, but more of having some weird but functional alternative to steer towards one hand gameplay alongside standard controls can help alleviate the problems faced by the genre combination(or h game and first person), especially when the movement doesn't need extreme precision or speed like a shooter does.
thanks for reading all my ranting and replying to it.