Seems like a good start, the journal doodles are a nice touch. It does seem like all the characters are pretty quick to jump on your dick, even Melissa and Kate who are supposed to have only 0-1 partners before, but it makes sense for the rest of the characters. A couple of suggestions:
1. I'd call the "notebook" a laptop or computer. "Notebook" is a brand of laptop, but at least in America it's not used as a generic term for a laptop computer, it's used for a book with blank pages.
2. I kind of get the idea with the studio minigame's design, but as it is it just encourages spam clicking to go through the picture set until you hit the income limit. I'd probably change it so you get a fixed amount for doing a shoot, and maybe when we get more outfit options it also ups the amount you get from doing a shoot. If you didn't mind completely changing it, you could also just give us a fixed income for each unique picture we take and put a limit on the number of pictures we can take (maybe even lock some of the options with fewer clothes behind an interest/lust threshold).
3. I'm assuming the stamina pills are a cheat for now until we can get to higher levels of stamina, but I still have to wonder what the point of the stamina bar is. I'm guessing your plan is to have a sex minigame where we need to balance foreplay with sex to get the girl off before we cum?
4. I'd probably change "Service/Caress" to "Fool around" or "Foreplay" and then the options could be "Focus on you/Focus on her," or something like that. Right now the words are kind of arbitrary.
In terms of content, I'm hoping we'll get to dom the two girls that Elena teaches with her.