I think you are in great shape and I am sure your essays are fine given all of these accomplishments.
You have a high chance of being among the 15% to 20% admitted ED if there are a similar numbers of applicants as last year -
If Rice attracts more ED applications from high achievers looking for admit rates that slightly favor their chances it will be a little tougher, but still looks good.
Keep working on fine tuning your other essays and review the purpose of the Senior interviews and have your thoughts and questions ready. They value demonstrated interest - but in ED that in theory is everyone.
Good luck!