first, find out (understand) what is the main cause of noise & fireflies in your scene
(hint: emitters &/or glass)
now, try harder
ie. clamp to 1 & set more and more samples… also, replace Glass BSDF for so called fake architectural glass & for the the faster way - introduce AO to the scene
yes, it will take time… either to study Cycles in detail or going the trial&error way
disclaimer
since you share no scene file, i’m out of serving fish on plate