You wrote
I read about it (mistake, should be: on a website) in a website
Correct
I read about it (fixed) on a website
Small words for when and where: at 8:30, on Sunday, in May
5 mistakes
O 'em/no/na' do português vira at, on ou in. Horário = at ('at 8:30'). Dia ou data = on ('on Sunday'). Mês e ano = in ('in May'). Um ponto específico, como ponto de ônibus, = at. Site e aplicativo = on.
Clock times take 'at', days and dates take 'on', months and years take 'in'. For a point like a bus stop or a door, use 'at'. Websites and apps take 'on'.
Relógio = AT. Calendário (dia) = ON. Mês/ano = IN. Site = ON.
Wrong: The match is in Sunday
Right: The match is on Sunday
Wrong: I'm waiting in the entrance of the museum
Right: I'm waiting at the entrance of the museum
Wrong: The film starts in 8:30
Right: The film starts at 8:30
I read about it (mistake, should be: on a website) in a website
I read about it (fixed) on a website
It's (mistake, should be: in May) at May, on the 12th
It's (fixed) in May, on the 12th
The film starts (mistake, should be: at 8:30) in 8:30
The film starts (fixed) at 8:30
I'm waiting (mistake, should be: at the entrance) in the entrance of the museum
I'm waiting (fixed) at the entrance of the museum
The match is (mistake, should be: on Sunday) in Sunday
The match is (fixed) on Sunday