start with sth / start by Ving / start from (place, time, position)

Start with + 名詞

• Start with the basics.
  
• Let's start with introductions.
• Start with the easiest question.

Start by + Ving

• Start by organizing your thoughts.

Start from + 時間/地點

• Start from zero/scratch.
• The race starts from the top of the hill.