Learn Mandarin

I have a almost 2 years old son and 10 months old daughter that will be taking mandarin classes. Generally, we’re not a mandarin speaker but I would like my kids to learn and become a native speaker. Is it alright thou? Like will it be too hard on them or they can easily catch up at this age? I have a friend who is not Chinese but she’s a native speaker, she told me that her mom send her classes from the very beginning and she continued until secondary. I honestly cannot catch up at this age 😅 Although, I really want to learn Mandarin. I have a thing for languages, you see.