I would encourage you to forget the recipe as written and apply standard measure to it to start with. Spoons of salt, for example are all over the map in weight, granulated salt vs kosher and kosher has 3 different gain sizes, so volume is worthless here. You can get by with volume on aromatics that are dry, but trying to convert a spooned measured recipe into weight is futile.
Apply salt in a percentage to meat weight. Weigh the salt. 1.5% to 2% is the playing field. That is 15g to 20g/Kg Salt to meat weight. Pick your percentage for sugar and apply the same.
For seasoning start with this.
paprika) 2g/kg
crushed red pepper) 0.5g/kg
cayenne) 0.5g/kg
whole fennel) 2g/kg
whole anis) 1g/kg
white pepper) 2g/kg
black pepper) 2g/kg
These will turn out a good product, but are definitely subjective to your taste and can be adjusted as such. Keep it straight forward and eliminate variables at the start. This is a much faster path to success.