Hi Animals 123, congratulations on your twins!
WOW 3 under 3 go you! Twins can be a bit daunting - I have a 6 year old who is very keen to help and it's still daunting! Im sure you will be absolutely fine - how nice your kids can all grow up together at similar ages!
A great place for advice and tips is the Twins Triplets and More forum - I have gotten so much great help from the girls there, its been a great help