What do you mean by "my own email address"? The one you are using now is "your own" in the sense no-one else has access to it (unless you are careless with the password
).
If you mean an address which you will really own (as opposed to having an exclusive use of), you have to register your own domain first. Then you could have address(es) of the
whatever@yourowndomain.tld form. This will cost you upwards of around $10 per annum.
Use your favourite web search engine to look up
domain registration. This matter has also been extensively discussed here.