I CANT GET OUT OF THE BOAT

so i saw that there was a new verzion 1.14.4 and i decided to try it my pc is a low pc using a dual core cpu a gt610 gpu and 3gb of ram so its a werry slow pc ok so i mad a super flat world couse my pc will lag if i use anything else and i made the thing that people use so they can travel faster using a boat and packed ice si u made that got in the boat and it didnt go fast and i tryed to get out of the boat and i couldnt i tryed to breack block and place them and it didnt worked.