Re: Setting up the date....did I do it wrong?
Scheduling is what it is. Lay low for now. Being pushy or clingy is the worst so far you are doing alright at not overstepping that.
Let me know when you are free part not digging that, but it isn't the worst I have encountered either.
After week of said plans find something fun going on in your area, an event of some kind, state that you are going to the event, at whatever time and day, it sounds like fun and you would like her to join you.
As a statement that you are doing something fun you do not come across as boring. Intend on going anyway regardless of her accepting or declining this will take the edge off any possible rejection and if it is no go you can sarge the event anyway. And last positive of doing that you are telling her you want her to enjoy the event with you, but you do not NEED her in order to have a good time.
Do not worry about her forgetting your previous interaction. This will only stress you out and isn't even relevant to your goal of getting another date.
Learn to be a better person not a better player.