I'm relatively new to project diva (bought the game about 2 months ago) and based on my expierience, yeah, the game is really fun and addicting. The gameplay clicked for me almost instantly, so I have been having a lot of fun playing the game since the start. Do note that as a new player, the game will feel hard at the start, even if you're playing a song on normal difficulty, but after some time, you'll be able to hit most notes easily. On another note, on higher difficulties, the game can feel brutally difficult that it can feel almost impossible to even just pass a song.

Also regarding the Steam version, they are just about the same, however the Steam version allows you to use Mega Mix's graphics or Future Tone's graphics, and the basics of adjusting graphics settings and resoluton (and modding if you want to count that). On Steam it is also cheaper since the VIP edition costs $60 and has all the games content available, while on Switch, the Mega Pack is $60 but does not include any songs past the first 6 DLC song packs