I've that one serissa from my friend's late brother in law. Though finicky...I expected it to be far worse. I can see why they detered me from purchasing it as a beginner first in. Because as a newb...we stress. Now...Shoot...I just walk by flick a dead leaf off and carry on with that one. It's healthy...a few dead leaves don't stress me none. It's almost like it has to do so to replentish it's growth. I think you'll be fine with it.
Now I don't freak anymore when its leaves turn yellow, as they keep doing that anyway.
One day this summer it was obviously too sunny for it so all the leaves started to look wrinkly, facing downward immediately.
But as soon as I moved it to more shade it looked happier than ever!
Seems to me that this little bugger is a real emotional roller-coaster but at least the good thing is that as soon as it doesn't like something it lets you know!
For the moment it is finishing its wintering in a not too warm room (never more than 55F) where it had been since Oct-Nov more or less and it never looked so happy than during this time: not a yellow leaf, nothing for all winter!
The most interesting 'tropical' I've ever seen I may say