Preparing your gear
The clothing you wear is important. Cycling shorts are very comfortable and move with your skin without chafing and rubbing. The absence of seams in the wrong places is a big bonus so not wearing underwear under your cycling shorts is normal and smart. Shirts that are lightweight and breathable are best.
Cycling jerseys are best but if they are out of your price range then something that doesn't stay wet with sweat is what you should use. Long sleeves to protect against the sun is a smart move.
Your helmet should fit snugly on your head. With the straps secured you should not be able to move the helmet forward below your forehead or backwards beyond your forehead. For a full list of suggested equipment refer to What to Bring.