Well, to read manga from right to left, first, look at the panels on the rightmost side and follow the sequence to the left. Pay attention to the order of the text and images. Sometimes there might be special indicators or symbols to guide you. With some practice, it'll become second nature.
The key to reading manga from right to left is to start on the far right and work your way across each page to the left. Make sure to read the text bubbles and captions in that order too. It might feel strange at first, but as you read more, you'll get the hang of it easily.
Just start from the right side and move your eyes to the left. It takes a bit of getting used to, but you'll catch on quickly.