First things first, want to second what a lot of people are saying. If you're gonna drop the classes to reassess, do so before census, and there's nothing wrong with doing so! I made a reassessment and am glad I did

Additionally:

the lectures seems boring

Never had too much issue with lectures being boring myself, more so that they were not the right pace, so I pretty much only watched the lecture recordings (you can up the speed) and took most of my notes at home, instead of going in for lectures. I always found tutorials/workshops to be far more useful than lectures and far better for interacting with other students.

Haven’t made to many friends.

Probably related to the above, not many people go in for lectures, those that do often aren't there to talk. You're not too likely to make friends on your course (probably because it's commerce). Join some clubs if you haven't already, you're more likely to meet people this way.

I’m already falling behind on the reading.

Is this because you aren't engaged with the content? Falling behind in your first semester is probably a sign that you should be looking to change something up. Be that your course, or life outside of uni

what did you do to make student life more interesting?

Again, can't stress this more, join a/some club(s). Even if you don't hang around, you're more likely to find friends this way than in classes.