a steamer from mccullough will be better. do small sections at a time, and dont get too close. its basically a more effective way of misting the engine.
I one and the pressure coming out is nothing compared to way people think. The steamer literally blows out steamy mist, there is no high pressure jet of water of coming out.
Check on ebay for a used one. I got a good deal on their biggest one, 100 bucks shipped to my door used with all accessories.
get a steamer, good bristle brushes, a gentle or diluted greaser and your good to go. and make some electrical connection cleaner.
I like to start cleaning out all my connections first around the wires before i clean the engine, then ill protect all the sensors after that with aluminum foil, and then clean the engine and surrounding areas.
import thing to note, small sections at a time, easier to manage.
and a nice air compressor is handy too to dry and blow loose dirt. I got a 220v 2 stage 60 gallon
edit: remove battery from the engine bay before doing anything, cover altenator, the chris fix video covers some good tips on what to remove and cover.