You can perfect this art through self study and actual practice.

你能通过自学和实际的练习不断完善这门艺术。

youdao

Individuals can enrol on self-study courses in the university's language institute.

人们可以报名参加这所大学的语言学院的自学课程。

《柯林斯英汉双解大词典》

If time is a constraint, and it usually is, you may want to consider self-study courses or find an experienced mentor.

如果时间受到约束，通常会出现这样的情况，您可能会考虑到自学课程或者找一个有经验的指导者。

youdao

Dr.Sotsky says some moderately depressed patients could still benefit from antidepressants, but his study showed that many others could do just as well with exercise,talk therapy, support groups or self help.

VOA: standard.2010.01.08

Now there are of course biases when we study ourselves which is why it's not enough to just study the self.

当我们研究自己时当然会有偏颇,这就是为什么只研究自己是不够的。

哈佛公开课 - 幸福课课程节选

What's the point of all of this study, all of this work, ?" all of this self-denial if I could just wind up" ? - this is a good question -- if I could just wind up dead tomorrow?

要是我就要死了，这所有的学习，努力，自我克制还都有什么意义“,-这是个好问题--要是我明天就死了呢？

耶鲁公开课 - 弥尔顿课程节选

Need something a tad more arcane, like Nuclear Medicine Self Study Program IV: Overview of Nuclear Oncology Topic 1?

FORBES: What the doctor ordered

There is a computer room but learning is self study with text books.

BBC

For now, the list of 2, 900 colleges and universities awarding credits for self study is dominated by community colleges and other second-tier institutions.

FORBES: Paying for College: The Three-Year Degree