It'll be fine. Disneyland is very busy for weekday off-season, but here's the gag- with the exception of 'Little Patch of Heaven' and 'Snow White's Enchanting Musical', every single attraction is open! That takes care of alot of people since they are so spread out. Most rides will be walkons- except for unavoidables like Space Mountain, which just get a fast pass for and have a 5min wait. You'll have a great time.