学新的单词

maybe you can write;
a new study way.
新的学习方式

that one will be much better to relate your whole paragraph.
your original topic is; studying new vocabulary

But in your paragraph, you don't talk about the new vocabulary which you learn.
you just talk about your use Anki to study vocabulary. the whole paragraph seems more focused on what kind of tool you using for studying, not the new vocabulary.

我很累 ，今天用anki学习中文。

The reason why I delete 我很累 is weird when I read it.
I translate what you wrote in English.
I tried, today using Anki to studying Chinese.
The first part doesn't relate to the second part.

这个方法很有用,因为帮我们学单词和句子很快很容易有效率

效率 ； effective.
很快很容易 don't make sense

如果我没有anki， 我觉得学中文非常难。

没有； do not have/ don't [sth]
ex; 我没有笔 - I don't have a pen
我是孤儿，我没有妈妈- I am orphan， I do not have Mon.

不用； do not use [sth]
我不用Anki来学习中文 - I do not use Anki to studying Chinese

如果你有时间/感兴趣，可能你可以看一下

感兴趣 the tone sounds softer. I prefer you use 感兴趣

我很累 ，今天用anki学习了中文，我现在好累。

我觉得这个方法很有用因为帮我们学单词和句子很快很，学东西既快又容易。

如果我没有不用anki， 我觉得学中文非常起来很难。

如果你有时间，可能你可以看感兴趣，可以了解一下。