Visiting Zurich :-)

Hello Everyone in Zurich community,

I will be visiting Zurich for the first time in April. I'm very excited :-)
I was wondering if you could give me some tips where is the best hotel location, what to see, are there any festivals/interesting events going on between April 18th-April 29th?

So any advice will be helpful and much appreciated :-)
Promise to help back if any of you are coming to visit Israel ;-)

Thank you!
Hilla