Besides soap and glycerin, the product likely contains plant-based oils such as coconut oil and castor oil, along with water, lye (sodium hydroxide), alcohol, and sugar, which are common ingredients in glycerin soap formulations to achieve translucency and softness. These ingredients help balance the soap and contribute to its texture and moisturizing properties.
Basically, you can wash your hands with it straight away. It foams like a charm without having to treat it first.
But: It is simply colourless and odourless and is divided into 3x 500g blocks.
The soap blocks are easy to cut with a kitchen knife.
I cut them into small pieces and then melted them slowly in the microwave, added a few drops of scented oil and cosmetic colouring and poured them into a silicone mould (e.g. ice cube mould). Instructions are included.
You don't have to, but it looks nicer and smells better. :-)