Switching web hosting providers doesn't have to be a hassle. Even those with limited technical knowledge can migrate their site to a new provider with the help of free migration services. Of course, there are potential problems that may arise, but they can usually be resolved quickly. Some web hosts will provide a temporary URL from which you can view your website, while others will have a test environment where you can make changes and view them in real-time.
If you're not sure if your host is experienced in switching web hosting, contact them and ask. Moving your website to a new hosting provider requires several steps that must be completed correctly for the migration to be successful. You can also access the files on the new server through the old domain without changing anything for your visitors. If you're also changing your URL, there's an additional step.
After the DNS change has been made, you can delete the files and database from the old server. It's important to do this before your website goes live, as any errors may be more difficult to correct once they're public. Keep in mind that while your DNS settings change, your website may experience a few hours of downtime.