@milkymaliknow I've copied this from this site https://blog.reedsy.com/word-count-novella-short-story-length/ that I recommend you look into if you can.
Briefly outlined below is the number of words fit for your project.
Novella: 17,500 – 40,000 words
Novelette: 7,700 – 17,500 words
Short Story: Less than 7,500 words
As you can see, any more than 40k would be considered a novel. However, it also depends on the genre. Given the information you've given me, I'd say yours will fit in either 3. If you're aiming for a standard "novel" 30 pages isn't enough. Hopefully this helps xx