Thanks so much for reaching out to me! I’m so happy you are thinking about freelance writing! It really is a great way to work at home! As for your questions, clients won’t be bothered if you contact them in the evening. I work with clients in the UK, Germany, Tel Aviv and more! So, what’s my time is not their time! I would suggest though to try to wake up before you work to answer emails and pitch, even if for 30 minutes in the morning.
About applying to UVOCORP, I must say, stay away from that company. I’ve been working as a Freelance writer ever since online outsourcing came to being. I encountered that company once when I am looking for other academic writing companies. But the experience is just horrible. They will have you started on a couple of assignments, and approve them right on the spot, but don’t get too excited. Once they see that you already has a few dollars on your earnings, the support sharks will flood you with multiple revisions with corresponding monetary penalties. The first and second revisions are ok, but after running your work on plagiarism checker hundreds of times and proof-reading for grammar mistakes thousands of time. They will still ask you to revise something and dissolve your earnings through penalties one after another. explaining things will not do you justice either, they wouldn’t even care what you say, they will just send your work for revision and ask for ridiculous changes that were not part of the original instructions.
These little jobs are done by people who log on to a company’s site and choose tasks, which could be as simple as clicking a link. Amazon's Mechanical Turk is one of the most well-known sites of this type. Also, there are crowdsourcing projects, which are similar to data entry, where companies engage an army of virtual workers to each do one small part of a larger project.