This is your FIRST website?

Outstanding!

Very clean & neat that creates a sense of sophistication and professionalism - very appropriate for a Professional firm like an Architect.

Suggestions:
You may want to consider using a wider resolution. I don't know why everyone uses narrow resolutions for their beginning websites. On a higher resolution monitor (which is what most people have) the site gets shrunk down and it loses some of its appeal. Plus its harder for old farts like me to read!

Excellent work in opening all of the links in a new web page so the visitor does not leave the website - that is not something newbies usually pay attention to.

The slide in layers are neat, but you probably could style them a little bit differently than the main site to achieve better contrast. Also they can be larger - white space is not necessarily a bad thing.

More spacing between the items in your lists would make them easier to read.

Paragraph/List titles should have some kind of emphasis (larger font, bold, different color, etc)

Overall a very good first effort!