I think you'd better have a team to do the SEO. Since there is too much work, you have to update the website with original articles and building external links. I felt very painstakingly to do it all by my own.
Firstly you should check your website as per designer part and seo related part after that it will be easy to do seo on your website.On your website you have put your keyword in footer but you had not link to them.