Hungarian is not related to English or Slavic languages, but the basic level needed for a citizenship interview is achievable with 3 to 5 months of consistent practice.
A simple learning plan
Month 1: Greetings and basics. Month 2: Personal details and family. Month 3: Hungary, food, daily life. Months 4–5: Practice consul questions out loud.
Study 15–20 minutes daily. Use pronunciation tools. Speak aloud even when practising alone.