What should I play next? Is Rachmaninov c# minor easier than it seems?

[sarahere]

Hi, so I learned the piano for 2-3 years as a child and did the easier clementi sonatas, czerny 599, Burgmüller op 100, some of the Anna Magdalena Bach book, tchaikovsky album for the young, some hanon and other stuff.
Then I stopped taking classes for some reason but kept playing here and there.
I played some non-classical stuff. I played czardas monti arranged for piano, I did the a minor chopin waltz and then I decided to start my piano classes again last year.
Here are the pieces I played later on:
Czerny 299 1,2,4,5,7,8,11,16
(None were full-speed)
Bach:
Some preludes,
2 part inventions 1, 4, 8, 9
Mozart:
sonata g major first movement
sonata c major
Chopin:
Mazurka 67 4
Waltz 69 2
Waltz 64 3
Waltz 70 2
Grand valse brilliante

I changed my teacher because of scheduling conflicts and now my new teacher wants me to work on these two pieces:
Rachmaninov prelude c# minor
Mendelssohn songs without words 67, 2
I'm half-way through the Mendelssohn and it seems very accessible technically.
And the Rachmaninov is technically accessible too, I'm done with it except for the ending but I'm not sure if playing these pieces is a good idea since they have a wild gap with things I've already played, especially the prelude.
(That's what I thought when I attempted chopin op 18 too but I just liked it so much so I wanted to play anyway)
Is my new teacher a bad one for giving me this piece?
Or is it just not that hard?
It says grade 9 abrsm and I don't think that's the level I am.
(BTW what would my abrsm grade be?)
What pieces could fill the gap?
Do I have to play easier pieces to get there or is it fine to just play the harder ones and go on?
I never played scales and stuff so maybe I should work on them too?

[transitional]

It's an easy piece, you'd probably be able to pull it off with your technique. The ending is just huge chords, so just memorize the fingerings/jumps and you should be fine. That section does not need to be too fast. The main point of difficulty is the agitato section in the middle, which can be acquired just by practicing slowly. Good luck!

[anacrusis]

I would say it is easier than it seems. Go for it!

[tomp86]

I tried it a couple of months ago and ended up giving up. I'm not at that level though