Hello, Sue, welcome to the forums.
Block has a very simple (and wholly annoying) cure: like it or not you write every day, no exceptions.
Even when you don't "feel" like it, you write.
To paraphrase Joe Bob Briggs, "What you write doesn't matter, it's the PRACTICE that matters."
The only way to Carnegie Hall (or to get print published) is practice, practice, practice.
(And getting a copy of Strunk & White's
Elements of Style. All the pros have one.)
If all you write is one page a day at the end of a year you'll have most of a novel finished. During the course of that you'll figure things out.
Oh, yeah, hanging around writing forums & chat rooms doesn't count as writing.
You might check this site out--it's for romance, but writing is writing. The basics apply for all genres. The info here is GOLD to newbies. Go there, have fun, learn.
Learn to write.
Good luck!