After the 'trial run' of the first event, which does grant you the XP you earn, you'll get to pick your first car from a choice of three. After you've done that, you're then on to Career. The first unlocked set is the Race E event.
You'll have the first three races unlocked, each consisting of 3 objectives, of which you'll need to complete 6 in total of them. There are 9 in total, all very achievable.
The Monument Canyon event consists of 2 races. Win that and you've got this one unlocked.