Week 1: Catch the reservoir
Nothing to build this week. I mean that. If you start planning streams now you will plan them with the reservoir mind, and the reservoir mind plans small, safe, and late. So the first week is observation. Two things to catch, and both of them are already happening; you just haven't been writing them down.
The sentence at the register
Every purchase decision this week, from the coffee to the course to the thing you looked at and closed the tab on, has a sentence in it. "I shouldn't." "I'll wait until." "Not this month." "Who am I to." "It's fine, I deserve it" (that one is the reservoir too; it's the same mind going unconscious instead of strict). You say it fast and you don't hear it, which is the point of catching it.
Write it verbatim. Not a summary, not what you think you meant; the actual words, the way they sounded in your head. One line per decision, whether you bought the thing or not. By the end of the week you will have a list of ten or twenty sentences, and they will be maybe three sentences repeated. Those three are the reservoir talking. You need to know them by sound, because they will show up again in week 2 when you spend the $30, and in week 4 when you spend the present money, and the only way to not obey them is to recognize them.
At each purchase decision this week, the sentence you actually said to yourself, verbatim
Every stream you already have
The second thing to catch: you already have streams. Several. Most people, when I ask them where their money comes from, say "my job" and stop, as if the job were the reservoir itself. It isn't. A salary is a stream. It is one specific thing you offer (your hours, your skill) to one specific buyer (your employer) at one specific price, and it arrives on a specific day by a specific route. That is exactly the shape of every stream you will build this month. The job is not the pool you are drawing from; it is one pipe into the pool, and the fact that it's a big pipe has been hiding the others from you.
So list all of them. The job, with the real number. The side thing that paid you twice last year. The session you did for a friend's referral. The thing you sold on a marketplace. The refund that arrived. The gift. If money came in, it came in by some route, and I want the route named: what was offered, roughly how much, and how it physically arrived (direct deposit, Venmo, cash, Stripe, a check in the mail). Five or six lines is normal; if you have only one, look harder, because you're describing the pool again.
What this does: once the salary is one line among several, the ceiling stops looking like the sky. You can see that money arrives through routes, plural, and that you have built routes before without calling it that. Week 2 asks you to build one on purpose, small enough to be unarguable.
Every stream you already have, including the job. Name, roughly how much, how it arrives.
Keep the ledger going this week too, even if the honest line most days is "nothing." A ledger with "nothing" written in it is a cause you can see; a blank one is not.