When will “someday” come? Like “tomorrow” it never actually comes. So why do we put things on the “calendar” for “someday?”
Thinking something will happen someday is a daydream. It's not a plan. Sure, things happen “someday.” often times at the expense of your real desires. If you really want something, don't just do it someday, do it now. If you can't do it now, set a real time to make it happen.
Trust me (I know from experience) putting something off for “someday” takes a lot more energy than taking the first steps today.