Sir, I have gone through your requirements as well as your keywords and site minutely.
Sir, keywords are no doubt competitive. It needs at least 2 months to come to suitable rank in SEARCH ENGINE RESULT PAGE.
Moreover, i have checked meta tag of your site. Sir, it needs to change the meta tag of your site. As an example, title tag of your home page now is : "Typing Lessons | Typing Games | Typing Test". This Title Tag is not SEO friendly. Google will not give priority to Typing Games and Typing Test. Only first keyword will get priority to Google.
So, it needs to be changed. I'll give you all details.
Sir, now I would like to introduce myself. I have 4 years experience in SEO field. So, I am very updated in SEO, even in recently updated Penguin 2.1 and Hummingbird algorithm, keeping deep knowledge of which is very essential nowadays to bring suitable rank in SERP.
I'll maintain total WHITE HAT SEO for your site. So, I must assure you one thing that your site will never be penalized in future.
And, Sir, my charge is $14 weekly.
So, i look forward to hear from you
Kind Regards,