Today's work was a little busy, too again. Today's work was a little busy again.

Today's workI was a little busy at work today, too. I was a little busy at work today, too.

Work isn't busy, people are

Because Nnext week, Swe start a webinar event. Because next week, we start a webinar event.

Because Next week, Start a webinar event. starts Next week a webinar event starts

To explain why you're busy, connect the following sentence

sSo, I'm getting ready for thisat event, in this week. So, I'm getting ready for that event this week.

so, I'm getting ready for ithis event, in this week. so, I'm getting ready for it this week.

You can say "it" when the subject of the sentence is known (here - the event)

I'm a little nervous, because it's my first 5 -days event. I'm a little nervous because it's my first 5-day event.

I'm a little nervous, because it's my/the first 5 -days event. I'm a little nervous, because it's my/the first 5-day event.

Add 'my' if it's your first time or 'the' if it's something more general, like a company's first time before 'first'.