I am new to bitcoin and my friend who uses bitcoins told me that it is better for new people to mine other coins what coins are best for new people and what coins are easiest to mine
Depends on your goals and resources.
If your goal is learning how to mine, i'd pick up a dirt cheap second hand miner (a geccosciense stick for example, or an old S3) and experiment with mining bitcoin. You will not make any profit this way.
If your goal is making a profit, you'll need to tell us your budget, electricity rate, knowledge, maybe even which GPU's you have at hand...