A few questions?

Hello,
I am starting my keto journey on Sunday and had a few questions to ask
1. Can I use Ikan Bilis as a snack? ( teeny tiny fish, crispy and yummy)
2. Is there anyway I can make my caramel macchiato from Starbucks keto friendly?
3. If I had a chocolate cake from Paul that had 27.2g of carbs per 100g can I have 10g of the cake everyday so I get 2.7g of carbs?
i would appreciate any help starting this journey
Thank you