I guess you want to express that you are wondering whether you are able to communicate with your new learned Chinese or not. So the correct expression should be : "我正在学习汉语。我学了新汉字，所以我想知道自己是否能够学以致用。谢谢！"

汉子 是指 粗犷的男人.... 应该是汉字.

我正在学习汉语。我学了一些新的汉字，所以我想知道自己能否用正确的使用学过的汉字。谢谢！ 汉子！！！！！！tough man!!!!!!!!!!!

恩 it's a very natural way to say

容我揣測你原來要表達的意思: I have learnt some new characters, so I want to know if i can use these characters that were taught. "if" 在這裡 翻譯成 "如果" 並不恰當 "是否" 才是正解 請 Lenny 提示你的原句