You should be proud that you are migrating your website from normal http to https(ssl), although it is not a big deal at all.
Beacuse if you are dealing with sensitive data on your website, it is mandatory that the data should be protected. an encrypted data is a secure one, and thus we consider SSL is the best solution for securing our data.
Have you hosted your site i a shared environment(is it is cpanel powered), then ask your host to provide a free ssl like Lets encrypt(time saving and free)
But one thing you consider that you should check your site with a developer and replace all wbsite content with http to https because otherwise you will get a warning symbol when you call your website with https.
but that is common and simple procedure for a developer.