Yeah. One big problem you will have if you drop right into multiplayer is the frustration of wanting to do one thing, and doing another. This will vanish really fast after you play some offline (even easy games) that is more enjoyable to play for several hours, because you will not really notice that you are practicing, but playing.
Note that there are a few advices to follow on using a keyaord/mice setup that are always good to follow, like having your elbows rest on the same desk where your M/K is, etc.