I've baked many birthday cakes &amp; other cakes from scratch.  I DO NOT own a sifter.  I never sift!  I just use a spoon &amp; 'fluff' the flour before measuring it.  If ingredients need to be sifter together, I put them in a large glass bowl &amp; 'fluff.'   I've never had a failure due to not sifting.
The cake does look good.  Love the 'Easter-looking' sprinkles.