sassy92:

1. provided your first degree is closely related to your intended masters course, you can apply. Work experience is valuable but you can still get admission without it.
2. Some schools insist you must provide an English Test (IELTS or TOEFL) while some will simply accept a letter from your university stating that your degree was taught in English (known as English Proficiency Letter-EPL). So check the requirements of the various schools you're interested in. But if you have the means, please write the English test as it will increase the number of schools you can apply to.
3. You can get a scholarship, check daad.de for available scholarships.
4. Your sponsor must be someone living and legally working in Germany. As for speed, the second name for this German waka is called PATIENCE. There's no way to fast track this process and don't let anyone scam you by promising you fast tracking.
5. Check Google, there are many sample templates.

Extra tip: Since you're a winter 2020 hopeful, you have a lot of time to plan and prepare. Go on DAAD/Google/WIkipedia and search for schools/courses, get a pen and jotter and write all the schools, courses, application requirements, application mode (whether online or via post or via uniassist), application timeframe. Start gathering your documents. Please sort out the issue of funding because from November 1st, 2019, the embassy requires all coming for student visa interview to come with their proof of funds. And read and follow this thread, you'll gain an immense wealth of knowledge. All the best!!

Meaning for 2020 entry, no more SL but BA.