Warning: There are sharks in the water. What are known as 'vanity publishers', who will try and tell you that you need to pay to become published, to 'get your name out there'. Some of them make it all sound seductively easy and logical. They may even tell you that 'many famous authors had to pay to get their first book(s) published'. There is an element of truth in this, in that many Victorian authors saw being published as a hobby.
The bottom line is still this. Real publishers pay you, (not always as much as you might think, or hope), not the other way around.
Self publish by all means, but your investment is the words, not the contents of your bank account.
Buy, beg, or borrow the Writers and Artists Yearbook, or the Author's Handbook. Both are often available from public libraries and also as downloadable e-books.
Gyppo