Why don't my ads appear at the top of the page when I search on Google?

A smart approach would be to work your way to the top by generating affordable leads in a short amount of time with a small amount of budget by bidding on lower position, higher quality keywords. Then start to scale.

How long will it take to see results? / What does a "90-day learning phase" mean?

Technically, you’ll start to see results right away; however, it takes about 90 days for a campaign to “normalize” to the point of understanding how it will perform long-term.