There are many kids at Grand Prom and sometimes they run around on the podium. The podium is one of the nicest that I have seen in HK. Hopefully you can take a moment to sit down and enjoy the wind and sea view.
TST is an option too. If you live near Kowloon Park, you wont have to worry about the indians trying to sell you rolexs lol. Consider Jordan, Olympic, and Kowloon Park areas. Avoid Kimberly Road.
The mtr is fast, and transfer at Admirlty is fast too. But its so busy and I watch my wallet everytime. I can get from kowloon tong to causeway bay in 25 min, so from tst is prob 15-20 min. Go online and see the MTR travel times, they are conservative usually and right on, if not in reality you can arrive faster.