Since the main book is entirely in Czech, follow these steps: Čeština expres 1 - CzechStepByStep.cz
Introductions and basic greetings ("Dobrý den!"). Lesson 2: Orientation and directions. Lesson 3: In a restaurant (ordering and food). Lesson 4: My family and personal relationships. Since the main book is entirely in Czech,
Grammar is intentionally simplified to focus on "survival" skills: Since the main book is entirely in Czech,