How do you learn a Language? How long does it take, with what schedule? How do you start learning a language, what steps did you take? Anyone learning a language alone that is Intermediate or higher level?

To Learn English Language there are a lot of steps and you can test yourself here.
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French I learned in high school. The rest of the languages I know I learned via book and tape (recordings) and immersion (placing myself in an environment where that language was spoken most often).

Dead languages (Latin, Greek now Hebrew and Aramaic) is though books only along with the book(s) that I am studying. Latin and Greek (written forms) are more interesting to me currently since I am reading old manuscripts/books as part of a wider interest in learning many things. Aramic and Hebrew I am only interested in due to my current fascination with Biblical Texts (including biblical times texts that are not part of the current collection of books called 'The Bible').

Living languages (French, German, Castillo Spanish (The Spanish used in Spain) I have in recent years taken to using electronic mediums (internet and Movies) to strengthen and assist with my pronunciation and grammar.

I have as a side bar to this learned Mexican form of Spanish by watching the Latino Channels. I also live in an area where I can see day to day use of this language and often sit and listen as the latinos chat away (Most have no idea I understand - LOL).

Immersion in a language is perhaps the best way, if you can reside in an area where only that language is spoken you learn to 'think' in that language easier than formal study where you are taught to think of your native language word then match it with the new language you are learning prior to actually learning how to 'think' in the language you are learning.

Learning other languages is a skill - like playing the violin, or being able to slam dunk readily on the court. Many people can learn a secondary language, but it is difficult and requires some formal education. Bilingual households where you are raised with two languages is the best way to learn two languages - since you start off early in life, when most people are most able to learn language skills.

How you start? Hm for me it was learning basic words, then stringing them together to form sentences then learning the proper grammar and word usage.

I also stuck to languages upon which my native English is based "relative" languages (French, German, Spanish) are slightly easier to learn because many root forms are found in english and you have a natural understanding of the root.

Farsi, Mandarin and other 'far flung' languages can be slightly more difficult since you have to gain an understanding of the root forms.

You first need an interest, then you need to have the will to continue learning. Most folk start but then stop thinking it is a waste of time, or finding no practical use for another language.

I personally continue to find reasons to exercise my language skills, reading books written in those languages, reading news papers, watching films, etc.