I don't foresee any problem with your experience letter, which appears to be 'good.' I also couldn't gather from your words if there are any adverse remarks in it. So, there is nothing to be afraid of. Put this to better use.
However, you might be asked an apparent question at the interview, "What was the reason for resigning from that job?" For this, you should have a very convincing answer. The rest depends on your profile and how confident you are while facing the interview in the near future.
Don't worry; one or two may not be a cliché, but the third or fourth cannot be missed (obviously, you will become more confident and experienced to face more and more questions/interviews, and you will become a veteran, in a way). Believe in yourself, improve your know-how, stay positive, and you will surely conquer.
All the best, friend.