Wave Candle Mold

This is my first design. I am quite new to 3D printing and, I won't lie, have almost no idea as to what I am doing. My wife wanted a mold to to make a wave candle so I found a design of a wave candle, added a box and a cone then subtracted the cone and wave candle from the box.
After that was done, I split it in half and rotated so that both pieces were laying flat.

This took me quite a long time without experience but I know it can be fixed and improved.

I would have liked to add holes in the mold on one side where the sides meet as well as corresponding fitting pieces to allow it to slot together but I will attempt that another time as this was hard enough for now with my limited knowledge.

NOTE: Make sure melted wax has cooled down somewhat before pouring as PLA will melt if poured in while too hot.

Maybe someone can remix it :)