Need some advice

Hi, I need to ask a question and I'm sure I'll sound like a noobie but I need the help

My friend and I got a clone each; he went outdoor and I'm doing it indoor. His plant has already bloomed but mine just keeps on growing and growing. It's huge for an indoor plant but I'm not sure why it's not blooming. It used to get 15 hours of light but in the past 3 days I changed it to 10 hours of light.

I'd like to know why mine hasn't bloomed yet and why it's taking so long

thank you!

Will need 12 hours of uninterupted daily followed by 12 hours of uninterupted dark time in order to induce flowering. Once you have it in that cycle it will take a week or two before you notice the change.