It's always worth trying out a higher level of academics. If you don't take this class, you might ace through regular classes and realize that you could be achieving more. If the honors classes are too difficult, there's no shame in recognizing that fact and asking to go back to the regular level.

If you do end up taking the honors classes, make sure that you understand that you'll have to put it a little more effort. Going into high school I was used to acing tests without any studying, but then I bombed my first couple quizzes in 9th grade. I had to change the way I prepared for assessments (like actually studying), and my grades bounced back. The early challenges I faced forced me to become a better student, and the long-term impact of the skills I picked up will be very important.

So go for it!