I think it's very different for everyone, so my experience might not be yours. I am very responsive to drugs and very susceptible/suggestible - so placebos work on me too! I felt a difference in my anxiety levels within a couple of days, also a bit weird/floaty at first then, easier and less noticiable as the weeks went on. The general experience is that it takes a few weeks, but also most people are prescibed 20mg I think.
As I said I wouldn't focus on side effects they are possibilities not definite things that will happen. I was/am a bit sweatier and I think my tummy is a bit more sensitive especially if I have alcohol. Hard to tell though, as I am also perimenopausal. There may have been other things but they no longer affect my life or I have adjusted without realising. What I do know is that if I forget to take it I am usually a bit weepy by the evening.
You know your normal, but if it helps with the anxiety and for me the contanstly spiraling thoughts, on balance that's a win.
I am not an expert on anything but me, and I have found other people's experience online not that helpful - their personal circumstances behaviours and bodies are not mine. I did google a lot at one point and people reporting in forums seemed to be taking it while drinking a lot, taking other drugs and with other mental health issues - so not always relatable or even accurate. People tend not to post when its all fine/manageable.
If you are anxious taking these things with a "suck it and see" approach is hard when you worry about everything and want to fix it. It may be the right dosage and treatment for you, but it might not. I wish you luck.