Rick Dangerous
Banned
thanks for all the comments.Hogwarts Legacy - I would personally rate it 2 out of 10, there is not a single difficult trophy and the game itself is very easy, yes you will have to run around the map to collect items and yes it can stretch out for 70 hours, but in terms of difficulty of obtaining it there is practically zero.
Resident Evil 4 - Not an option at all, simply because you'll have to play through it several times, most likely with the help of a guide. Plus, if I remember correctly, you need to play through it on Hardcore with an S+ rating. I know very few people who enjoyed this platinum, especially if you don't want to play through the same game over and over again. This is difficult 6-7-8 out of 10.
Elden Ring - Not the most difficult platinum, I would rate it 5-6 out of 10, but again, as a game for a person without experience, no. It's 70-90 hours of gameplay, and 100% impossible to complete without a wiki and guides, and if you don't use the trick with saving to a flash drive, you'll have to play through it three times.
Sifu - It will depend entirely on his abilities, overall 6 out of 10, about 20 hours. But considering that he had problems in God of War with Valkyries, timing is definitely not his strong point, so it will most likely not be easy.
Sackboy - I haven't played so I can't say anything
Rime - I would rate the difficulty with a guide at 2 out of 10, without a guide it will most likely not work in one playthrough. Not everyone likes to play games according to guides, so it is at his discretion.
Although all this is of course subjective, everything will depend on him. If you don't like the game, then collecting platinum in it will not be any fun, if it drags you in, then you can try. The main thing is not to get hooked on this thing, otherwise you can eventually burn out on games =)
Side note : i'm not totally a noob, hey, being gaming since Pong... so about 40+ years....