Who can help me with the following, see this picture I would like to make in magento and I do not know where to start.
Who has a link or can help me here?
If you would like to make possible to create various options to type in and drop-downs to select for products, the easiest option will be to create simple products with custom options. Please note, with them you cannot track inventory for variations, only for main product.
If you for example need to track qty for each combination the clients select, you can have a look at configurable products.
Here is the difference between those product types -