Looks pretty good. Only thing I see, and I had to zoom in, is a
slight misalignment on one of the double hearts with maybe just a tad
too much solder. One thing you can do next time is, instead of
splitting the heart in two, which necessitates careful alignment, is
cut a notch on the back of the front heart and a corresponding notch
on the front of the back heart. Both should be halfway thru the cross
section. Go slow, make a tight fit, then just enough solder to bond.
But I think you’re off to a good start.