This is the 484th most frequent Portuguese word.
começar
To begin; to start.
In this sentence, 'começar' is used in its infinitive form to denote the initiation of an action (starting a course) in the near future. It is preceded by the auxiliary verb 'vou', which indicates future tense.
Eu vou começar um novo curso na semana que vem.
I will start a new course next week.
Here, 'começar' is in the past tense (pretérito perfeito), indicating an action (the beginning of the show) that occurred at a specific moment in the past.
O espetáculo começou às oito da noite.
The show started at eight in the evening.
In this example, 'começar' is in its infinitive form after the modal verb 'pode', suggesting permission or ability to initiate an action (starting the project).