When did you start learning English?
How long was it before you could hold a conversation in English?
When did you first put your learning into practice?
Have you progressed as well as you expected?
Have you even been immersed in an English-speaking country?
How important is it to you to speak accurately?
What level of competence would you like to attain eventual?
In your experience, are native English speakers good at speaking second languages? Why / Why not?
Apart from English, what's an important second language in your country? Why is it important?
Do you speak this language? Is it widely spoken? Why / Why not?
Interaction
How can these factors have an impact on second language learning?
the right mentality
financial limitations
distractions
opportunities for interaction
first language interference
natural competence
the prestige of knowing a second language
To illustrate the topic you can listen to this BBC recording on the difficulties Britons have to speak foreign language and polyglot Susanna Zaraysky's opinion on how to best learn a foreign language.