New to engine detailing

[Markymapo]

So I assume (with this mess) I clean the surface of engine compartment and inside of hood with some APC diluted appropriately followed by some 303 Protectant. I have only tackled the outside of cars ( coming up on one year anniversary on taking Mike’s class in Medford) so this engine cleaning has me a bit perplexed ( too many crazy electronics to mess up)
(it’s my 2016 M4)