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Something about your concept that I find interesting, even as simplistic as the game is in its present form. You say it's an alpha so I'll hold out hope you're able to address a lot of the shortcomings with the next release. A few points, though -
I've experimented extensively with creating my own movement and as far as I have been able to determine it is impossible to ever get art in your own style accepted at the yearly salon. Am I missing something or is this bugged? Even if I am, it's a problem if it's that opaque.
Styles that reject particular elements emerge late in the game when the player is likely to have very high skills that actually make these styles inaccessible to them. I'd suggest changing that entire mechanic.
Paying a one-time access fee for new materials seems silly. Rehaul the shop system completely. You might put certain materials behind particular event unlocks - maybe even some unique ones like opportunities to paint a fresco for a prestigious building or... something? As it stands the difference in price between the materials isn't even really high enough to justify buying lower end ones - it barely costs more to buy into the top tiers. And, given the number of great artists who have used any or all of those materials it just bothers me that there's no actual reason to use almost any of them except being unable to afford better. The game would need to get more complex overall to create any mechanic that gives a serious reason to use more varied materials but I'd suggest keeping that in mind as a goal as you build new features.
More complex interactions of the player's traits in general would lend this a lot more depth - I almost picture this turning into something vaguely in the vein of Academagia. That would be a pretty interesting concept, in fact. Look into it. We need something besides "grind to ten in all stats, pound out masterpieces until the timer runs out."
Similarly, it seems fundamentally silly that certain artworks claim to emphasize color when you're drawing them in monochrome media like graphite or chalk, or sculpting them in bronze or marble. Just something that seemed off to me - maybe you should rethink the way that materials interact with subjects in that respect.
Likewise, I really didn't like the way the subjects are arranged in linear order of value in that way. It just feels fundamentally wrong that "historical" artwork is treated as objectively superior to every other subject. See some of the above - if art interacted with materials and player stats in more complex ways there would be more room to differentiate the options from each other as actual choices and tradeoffs, not linear upgrades.
What do the traits and flaws even do? Forcing us to guess the effects of things that only cryptically effect the rng in some way stopped being cool in the eighties. Stop it.

All I can think of for now. Your concept actually interests me, for all of the criticism, and I'm hoping to see more out of this in your next build. Looking forward to it.

Gets boring after a while. I keep getting offered to learn undefined art and Salon de Paris even rejected my 5-star masterpiece. But, this is a pretty nice game. I hope you don't abandon it. [4.5/5]|[9/10]

2 words: OH WOW! Beautiful; trop beau mon ami, trop beau.

Holy shit. I just want to paint everything now.
This is such a simple game, but it's so damn addicting.
Kudos!

it is a very interesting game. but it is kind of...unrealistic.
how long am I going to live?
am I really such a genre-wh*re that I can just do what I want? :D
but what really shocked me was meeting van Gogh 1912.... (he died in 1890)
I know it doesn't really matter but maybe you should have done more research on the artists you use....especially when they died :'D
4/5