Travel around Macau

Hi may I know if it is easy to explore places of interest in Macao by bus? We are a Chinese couple of >60 from Singapore, can read both Chinese and English, healthy and can walk for about 1 to 2 hours with break in between. May I know what is the best way for us to explore various places please. Where can we get bus guide? Do we need to change hotel in order to facilitate our exploring. Would like to hear your recommendation on accommodation, our budget is not more than S$200 per night. Your advice on clothing as well please. We plan to go after Christmas or after Chinese New year. Thanks