Hi,
I'll add my 2 cents with perhaps a couple thoughts I haven't see written above. All of the above is good advice.
The weight of the helmet decreases when you are on the bike with some wind pressure holding it up... and different shell materials affect weight and cost -- do some research and you will be glad.
I recently bought a closeout AGV designed racing helmet from Dennis Kirk online for $60 (usually $260) and the peripheral vision is outstanding, though the fit tight. They do loosen up. It doesn't fit perfectly for me but my plan is to only wear it at the dragstrip for short rides
+1 on buying an everyday helmet in a store.
I have used every helmet style I can think of, including no helmet years ago when I was young. My SHOEI years ago never felt right, felt heavy, and was a PIA to get on with eyeglasses -- I bought it because it was "the" helmet to get rather than the right one for me -- $300 mistake in 1990 dollars. I swore I'd never wear another full face helmet. My SHOEI "mistake helmet" was on the shelf and I was lidless when I went down in 1992. All I could think of as I was falling was "keep your head up!" I never want to have that feeling again.
I still wear glasses. My everyday helmet has become a flip-up for comfort and ease of wear, with admittedly compromised lower jaw safety. I bought one 15 thousand miles ago for a long-ish trip on a slab and knew the noise and buffeting from my half helmet would kill me. Never looked back. The half helmet with extended face shield sits on a shelf and I haven't worn it since.
Then they came out with lighter materials, better visibility, different shell shapes and even the flip-up hybrid.... So I tried a flip helmet last year. But the best helmet is the one you will wear, so make sure it fits.
Nolans don't fit me, though they are stylish and wish they made a shell for my noggin.
I have seen written the SHOEI RF1000 is eyeglass friendly with spaces for the arms to slide in easier than other brands/models.
Like finding the right fit in gloves, jacket, or motorcycle, it will take some research, time and experience to find the right one for you. But the search can be fun too.
Good luck.