Questions & Answers about Esta maneira é simples.
Both are demonstratives, but they point to things differently.
- esta = this
- essa = usually that, or sometimes this in everyday Brazilian speech
In traditional grammar:
- esta refers to something close to the speaker
- essa refers to something close to the listener
- aquela refers to something farther from both
In real Brazilian Portuguese, people often use esse/essa where older or more formal grammar would prefer este/esta. So Esta maneira é simples is correct, but in everyday speech many Brazilians would more naturally say Essa maneira é simples depending on context.
It is grammatical and understandable, but it can sound a bit formal or bookish depending on context.
In everyday Brazilian Portuguese, people often say things like:
- Esse jeito é simples.
- Essa forma é simples.
- Dessa maneira é simples. (in some contexts)
- É simples assim. (very common, but not the same structure)
So your sentence is correct, but maneira and esta together can sound slightly more formal than casual spoken Brazilian Portuguese.