Welcome. This is a nice sketch of you and your ambitions. Freezing is probably the editor in your head taking over. For flash fiction, sometimes prompts and a deadline help. But not always, so we can explore freezing more if you wish. I’m guessing your “five years from now” would include publication. The first stories I ever published were flash fiction, and the market is much better now than in pre-Internet days. There are some real opportunities out there.