If you choose to perform maintenance on your own Suzuki GSX X Impulse then it is always recommended to have access to a Workshop Manual to use as reference in case that you need to know tips on how to take off a specific part including Door and fit it again safely.
Suzuki GSX X Impulse Workshop Manuals can offer you targeted diagnostic information for the car so if something is wrong it will help you find out what the issue is and how you can correct it. After that you can assess if this can be achieved by yourself or in case the job is simply too big you could make a booking for your GSX X Impulse right into a decent friendly mechanic.
Suzuki GSX X Impulse manual