For accommodations, check the myriad of online booking sites specializing in hotels in Asia . I have used www.asiatravel.com many times in the past with good experience. Also check www.planetholiday.com for comparison shopping.

Asia is generally a tourist-friendly destination, more so for the places you're visiting (HKG, SIN, BKK). English is widely spoken almost everywhere with Singapore having the most fluency followed by Hong Kong and Bangkok in that order.