never heard of the phrase before, but it basically means to sleep and to wake up.

watch this video https://www.youtube.com/watch?v=amua9GfnpRM, there's a list of apps in the description.

您们从来没听人说过，可以说“各位”或者“诸位”，但是诸位比较古老点

Grammatically speaking it's not wrong, however it sounds weird, that being said people will be able to get the gist of it.

每节课一个小时 每节课是一个小时 做自己喜欢的事就好了 rhe other sentences.you provided are not grammatically correct

学is a verb in most cases whereas 学习is a noun but can also be used as a verb. 我学习中文 = 我学中文 中文的学习 but its incorrect to say 中文的学

to be honest with you, 30min a day ain't gonna cut it. here's what you need to do, get yourself a audiobook, listen to it whenever you can and wherever you can and as much as you can. Do that for 100 days and you shall see the improvements.

好似 = 好像, however 好似is more formal than 好像 一样 means "the same as", you could say something like: 那朵云好像和人脸一样。