Semi dee is already start selling for few months d....only Garden home still not yet open....

Usually SNP will go by batches.....as long as u got your desired unit and locked it, i think is fine,.,,

If developer also no rush to push you sign SNP, is even better for you to take your own chill time.,

Err.. Norton won't be ready this year.. It's Avenham and Graham that will.. Earliest for Norton would probably be Q4 next year or later. So far, I don't think there's a dedicated FB page. I offered to create a Telegram group.. But no takers yet.
Though, depends on one's taste level and if it'll be done by pros or DIY. Some folks are quite gifted in such matters, so might try the DIY route first or mix and match.. Let a pro in on certain areas.