Alya Sometimes Hides Her Feelings In Russian - Chapter 10 Yuri Sisters, I don't Dislike That 3

А для этого и побыть в одиночестве совсем не проблема
The literal translation would be
“And for that even being in loneliness is not a problem at all.”
А – actually, it’s used more like “But”, but it’s also used to connect sentences, where its meaning can be like “while” or “and” or “but”.
Для этого – for that
для – for
Этого – a form of word “это”(meaning “that”)
и – and
побыть – to be (for a finite while)
в одиночестве – in loneliness
в – in
одиночестве – a form of word “одиночество” meaning “loneliness”
совсем – at all
не – not
проблема – problem