我要跟你们做朋友

我是印度尼西亚人。我是华人但是我不会说汉语。现在有机会我要跟朋友们做朋友，以后希望你们可以帮助我练习汉语。谢谢。

很高兴认识你 Nice to meet you ^^

It's advisiable to always be aware of taking context factors into consideration when learing chinese,

1. 我想和你们做朋友 is more politly as it's a title, if you say 我''要和你们做朋友'', that's maks sense indeed, but people will think you are rude because ''要'' has a meaning of forcing someone do things for you AND THAT'S THE ONLY INFORMATION PEOPLE GET J FROM YOUR ISOLATED TITLE.(In this case, forcing people to be your "friends" without knowing who you are where you fromand what characters you have, which isn't exactlly you want) And I think this may relatting to our culture. And in r sthird sentence(如果有机会的话我要和你们做朋友，)''要'' has a different meaning: 我要means ''I WILL''.

2.''有机会'' means ''have the chance or it's possible for doing something''

  ''如果... 的话'' is a commen way of making a assumption.

3.let's have look at your sentence:以后希望你们可以帮助我练习汉语, we consider that the subject of this subsentence is ’‘我'', and we leave out the word ''我'' because the subject of the previous subsentence is also ''我''.

But if you put the word ''我'' back to it's place then we can find out the problem.

''我以后希望''means I don't want thing happen right now, but on tomorrow or in next year, I will hope something happen.

3.You can't just say that because you not only practice your certain kind of skills, but also understand a different kind of culture better. In other word, it's more precise for you.

我想和你们做朋友

我是印度尼西亚人。我是华人但是我不会说汉语。现在如果有机会的话我要和你们做朋友，希望以后你们可以帮助我学习汉语。谢谢。

我想和你们做朋友

我是印度尼西亚人。我是华人但是我不会说汉语。现在如果有机会的话我和你们做朋友，希望以后你们可以帮助我学习汉语。谢谢。