How to do it?
Re: How to do it?
Generally the Google search ads are approved immediately using the automatic system if there is no complications in terms of policy violation or the Billing details which an advertiser submit while activating the account.
If you have already created an AdWords account, then you should look at the ad status and see if the ads are approved or not.
Re: How to do it?
Welcome to the AdWords Community!
To add to Pankaj's answer - there are two ways to appear on the front page of Google Search Results - in the Paid (via AdWords) and Organic results. Google does not accept and/or guarantee placement or inclusion in the Organic results.
Via AdWords you can buy Keywords, write Ad Copy, and select the maximum amount you're willing to pay per click. Typically, if your Keywords and Ads are approved, and payment is successful, you can be up and running in the Google Paid results in ~15 minutes.
My own advice - make sure that you're comfortable with the AdWords platform and really understand it before launching your Account. AdWords is a great, but powerful tool. Best results are usually achieved by really taking the time to research and learn how AdWords works and it's intricacies. I've listed some resources below that you may find useful.
Growing your business with AdWords (aka AdWords for Beginner’s Guide) – Simple, yet thorough explanation of the AdWords platform and how to set up an Account. I particularly like this resource because it’s linear and gives you examples and tips. http://static.googleusercontent.com/media/www.google.com/en/us/adwords/pdf/hc/growing_adwords_en.pdf
AdWords Help Center – All you ever needed to know about AdWords in one place with great on-site search functionality. Recommended: Set up your account and start advertising
AdWords YouTube Channel – If you prefer watching videos vs. reading, this is the place for you. https://www.youtube.com/watch?v=TUXBVLQSWhw
AdWords Community - Yes, you’re already here, but besides posting questions, take time to review questions that advertisers have previously asked, and their solutions.