1. for ur major project? hell no. don't take the risk.
2. we made websites last year for a project (prelim course stuff, not hsc which is weird u gotta do it now), i used squarespace but really its about the UI/UX principles that u learn in class (it was pretty easy to use), so if u use ai to execute it then what's the point of learning it if you're not gonna put it into practice urself ykwim
3. is this website part of a wider project too? what else is there ya gotta do? also internal major projects should almost be done by now

when's it due?
good luck man