How do I fix the problem?

just keep an eye out for what scrap metal is going for per pound in Spokane, WA! hopefully you're joking about pressure washing that engine with it running or even not running?

Make sure you shut down the engine before the water has any chance of reaching the air intake. If this has already happened and the engine has stopped, do not try to restart it. Using the starter motor in the aim of bringing the engine back to life is the most common way to solve the problem (if no damage has occurred), but only after the combustion chamber has been given an orifice to eliminate the water through - this can be done by removing the spark plugs or the injectors, but I'd recommend towing it to your nearest Certified shop to have them help you before further damage is done, especially since it's your first car! Water can lead to problems so profound the engine needs to be replaced altogether. Only a shop can evaluate the situation for certain.