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I don't foresee any problem about your experience letter which appears to be 'good' and also I couldn't gather from your words if any ? adverse remarks in them. So nothing to afraid of. Put this into better use. But you might be posed with an apparent question at the interview "what was the reason to resign from that job" for which you should have very convincing answer. Rest is left to your profile and how confident you are while facing the interview in the near future. Never mind one or two may not cliche but 3rd or 4th cannot miss (obviously you'll become more confident & experienced to face more and more questions/interview and you'll become veteran, some sort of). Believe in you, improve your know how, be positive, you'll sure to conquer. All the best friend.