No, is not necessary to shut down your Mac at the end of every day.
This question gets asked a lot. Some users will leave their Macs on 24/7 for week’s or months at a time. Others will shut down every night. And then many others will fall somewhere in between. The long term health of the Mac isn’t really affected one way or the other.
So it really comes down to preference and what works for you in your own situation.
I believe that shutting down occasionally - several times a month or once a week - is best because that gives the OS opportunities to clear caches and run diagnostics at power on. But as I said, it doesn’t seem to matter in the end what you do.
Enjoy your new Mac.