Let's look at your sentence and make it grammatically correct:
Original: To start learning to swim, you’ll need a swim suit, a swim cap and goggles.
Corrected: To start learning to swim, you’ll need a swimsuit, a swim cap, and goggles.
Explanation:
- Swimsuit is one word, not 'swim suit'.
- When listing three or more items, we use commas to separate them. The comma before 'and goggles' is called the Oxford comma; it's optional but recommended for clarity.
- Make sure to include the comma after 'swim cap'.
So, the clear and grammatically correct sentence is:
To start learning to swim, you’ll need a swimsuit, a swim cap, and goggles.