Yep, you'll have headwinds, I did. I didn't die or anything, but I did whine a bit.
Just keep the ocean on your left, it's not that complicated. You've ridden across the country, you already know how to do it.
It's mostly hwy 1 for a while, then it goes on 101 where there aren't any alternatives. Just always look (on a map) for roads that will keep you as far west as possible & off the highway when possible. You can figure it out with regular maps - an atlas or a map from a gas station will work just fine. You'll probably want maps with more detail for San Diego, LA, and San Francisco. There are Pacific Coast Bicycle Route signs, but I have a feeling they are more for southbounders, so don't count on them.
You can also look at this site (posted by someone on this forum, can't find where but I had saved the link) where he has made google-ish maps of the ACA routes, if you want to know what roads they use.http://tsteven4.qwestoffice.net/
Or you can buy the Kirkendall & Spring book "Bicycling the Pacific Coast" (try REI in San Diego or there's one a bit north right on the coast highway on the west side of the road, sorry can't remember the name of the town, maybe Encinitas.)