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The cheapest one you can get :) and one you can mount on a tripod.

is there a special trick for a beginner

Put the dial on Aperture Priority or Manual and learn how the interplay and relationship between Aperture, Shutter Speed, and ISO.

indeed I also use a tripod, especially when I take a photo of the sun
either sunrise or sunset

Then if you already know about Exposure you need to learn about Composition - this will take you to the next level 10x more than a new fancy camera can :)