Some people need to do very low with carbs to reach ketosis but usually your intake is good enough. Many can tell if they are in ketosis and others simply can’t.
And the benefits… I experienced none on keto until fat adaptation though I did low-carb even before. It’s still the case. Low-carb and mere keto feels the same, it’s different if I am closer to carnivore or if I eat much more carbs. And some benefits I would like (more energy) never comes, not even on carnivore (I get other benefits though so that’s nice).
Certain items can interfere with various things for some people, hopefully someone knowledgeable comes soon and talk about that. For me, ketosis was all about net carbs, apparently (there were more or less strong hints in the early times, that’s why I am pretty sure about it. now I can’t tell at all if I am in ketosis), that’s easy. BUT just ketosis didn’t give me much benefits, I had to go lower for that (with my plant carbs, animal sugar seems fine).
I personally experiment and see where I feel the best, not caring about numbers I can’t check anyway (tried to buy strips and failed and now, years later, they are surely even less reliable).
I would think you have lost at least some fat as 1900 kcal is a pretty low energy intake for someone with your stats (of course, these things are very individual, still, it’s unlikely yours are so low).
You lost little enough that it’s possible it’s almost all fat though if you are in ketosis, you are supposed to lose more water than that… At least that’s the usual thing, there are big individual differences, of course but I always heard about bigger water weight loss. Our bodyweight may fluctuate a lot too (mine is freakishly stable so the sudden water weight changes when I went back to keto or stopped it helped me to figure out if I am in ketosis, that was helpful)… For me, and it’s probably common, the water weight change (2kg in my case) came in the first 1-2 days while stable fat-loss has a trend so it was easy to tell them apart in my case. But for anyone, ignore the first several days and then you get bodyweight changes and if you lose fat steadily, you see the trend eventually, the more your bodyweight fluctuates, the later you can be sure it’s fat but it happens eventually if you do things right
And you see it on your body with your eyes and earlier on your measurements, loosening clothes anyway.
How do you feel? Do you eat enough to be nicely satiated most of the time? 1900 kcal works for some and too low for others. And too much for some smaller people but with your stats, I definitely wouldn’t think it’s too much food. If you ever had such an idea.
If you are very very curious and it’s not too hard, you CAN try going lower with your carbs I suppose but I personally would be patient and see what happens later. Very little time has passed. Sometimes benefits come after fat adaptation. Be comfortable with keto, eat enough to feel fine, maybe try to limit or cut out items you consider not so great but only if it’s not too difficult… IDK about you but just doing keto can be challenging in the first times so extra hardships may not be right at that time.
IDK what is a zero sugar coffee creamer but why? Isn’t proper cream - or if you use a minuscule amount so a box of cream would go bad, coffee cream in tiny package, you probably have those too… - is the best thing for a coffee? Or you have some problem with dairy? (I still would have better ideas, coffee creamer is some weird stuff, always was confused about it.) No idea about the other mentioned items.
Good luck!