can you give me some advice on how to learn English well这里的介词为何用on不用about 活着 of?

i have been american for years.people here don't care that much about grammar.if what u asked is about to take an exam ,u'd better use the so called proper vocabulary which is "on"~but if u r going to acclimate an english condition ,using "about" is fine~ got it?
if u need more help on english ,e-mail me.

on表示“在某一方面”的。

on "关于" 表示较系统较完整的内容,可供专业人员学习研究使用
about "关于"表示有关某方面的内容
of“有关,涉及”比以上两个更不具体

这是固定用法，give sb advice on。。。给人关于。。。的意见