Welcome

I am glad that I found such an interesting forum that is very active and many people answer questions

I've been playing the clarinet for a while, but I'm not a musician by education. This is my hobby and I need a few tips that are probably obvious to you.
How is it best to do trillies from C3 to D3, from A2 to B2 and so on? The point is not to use three fingers with two hands, because the sound then "slips".

Then write that you can use the second and third key from the top on the left for the first trill and then you only use one hand. Trill comes out better than using 3 fingers of two hands