If you're good with both Japanese and English and want to translate a visual novel from Japanese to English, the key word is "want." You should want to translate the game for a specific purpose - usually it's because you enjoyed the title and want to share it with others who can't read Japanese. After all, if you can already read it in Japanese, it's pretty pointless to translate it to English for yourself. So in that case, you need something you honestly liked and want others to like. Anything else will feel like an unpaid chore, unless you get lucky and the title suggested by someone ends up being enjoyable.