What do you do it's depends on your wish . I say that because if you hard word by blogging you can earn $50,000 +  in a year . Many blogger earn much  $4,00,000 + in year . because 
https://millennialmoney.com 

millennialmoney earn that thay work heard for it .
Just banner ads 728*90 is possible making big money . Increase your traffic firstly than earn will be many ways.

Many ways you can earn money by blogging read full article

If your visitor monthly 10k and CPM $0.05 than your income will be  $50
If your visitor monthly 20k and CPM $0.05 than your income will be  $100
Increases CPM
If your visitor monthly 10k  CPM $0.10 than your income will be  $100

Use many type of ads in you site banner , text ,images and content matching ads you can take extra impression your earn will be increases .
How To Increases CPM
If you want to increases you CPM than start SEO for USA,Canada,UK , Netherlands, Spain,Itali, and Brazil  .If your site gets this countries visitor than your adsense CPM  will be increase like that
 $1.00   , $ 2.00 , $0.90, $0.80 , $0.50 ,$ 0.20

If your visitor monthly 1000views  CPM $0.50 than your income will be  $50.

Affiliate Marketing :  You can earn extra money in your site by affiliate marketing . Amazon is the best affiliate site for start your income in affiliate. You can give a post in your blog on product reviews than you can give in content your amazon product link.If anyone buy in your link you will give commission .

Sell Books:  You can sell of your books to your blog. You can make any pdf  book  there will be good content that’s you can sell your book in online.