Of course, you just have to figure out the most important tasks of your day. This might mean spending less time with your computer, spending less time watching YouTube videos, spending less time interacting with your friends on social media sites. This may also mean you could get up half an hour earlier or stay up half an hour longer.
Do the most important tasks of your day first and then you will have a little more time left for yourself. One thing that is important about finding time is understanding that you don't need to practice for many hours without stopping. You see, if you have only 30 minutes available for organ practice that will be just enough time to do it. So 30 minutes of wise practice might be enough to begin to see the results.
The problem is when you start skipping the day and spend the day without organ practice. If you practice one day and skip a few days, then your practice is not consistent. The most important thing is to spend every single day with your instrument at least for 15-20 minutes. If you only have 15 or 20 minutes try to repeat the previously mastered material.
If you have 30 minutes, then perhaps take 15 minutes for repetition of previously mastered material and 15 more minutes of learning something new. If you have more than that, of course, add some time for improving your pedal and finger technique - some technical exercises, scales or arpeggios.
So about 30 minutes a day will give you consistent results of your practice. If you are freer on weekends, then you can spend more time with your organ pieces during Saturday and Sunday.
Perhaps on weekdays (Monday-Friday) you only have 30 minutes for your organ practice but on Saturday and Sunday you can spend perhaps two or more hours. That will work very well for your practice.
Apply my tips and you will be able to find just enough time for yourself to play every day. Try not to make any excuses for skipping your practice.
Remember, if you spend one day without practice, only you will notice. If you spend two days without practice, your teacher will notice it. If you don't practice for three days, everybody will notice it. If you spend every day practicing just a little, then you are moving towards your goal one step at a time.