Big tip: you don’t need to be an expert writer to get writing jobs which consist of writing Web content and blogging. If you can write an email message with correct spelling and punctuation (most of the time) you can write webpages and blog posts and get paid for it.
If you’re a beginning writer, realize that every website needs content. This content is in the form of straight web pages, social media postings, newsletters, and email messages. If you can write an email message that people can read and understand, you can learn to write for the Web.