margeshp

If you are posting on Facebook, then it will not affect your SEO. As you have said that you are getting relevant people from Facebook posts then you can continue facebook But if you want to improve visibility in search engines then you have to start a blog where you can share your experience, information posts, etc. People will also find your website through search engines. So in that way you will get traffic from both search engines as well as Facebook.

I would like to suggest you to start from scratch. As you are a beginner so it is the easiest way to develop anything using php. If you go with a framework, then first you need to understand the features and flow of that. I have started in the same way and I learned a lot from it.

if you are looking for web design inspirations then you should visit websites like Template monster, Themeforest, template world etc.

One of the best options to check your backlink is Google Webmaster tool. You can find websites which are linking to you. It is the most appropriate way to check backlinks. However, if you want to go into details like anchor text, newly build ilnks, link loss, backlinks to different pages on your website, etc. then you should try some paid tool like ahref site explorer.

You can find a good SEO person easily but you have to do some research on it. You can ask about the latest updates in SEO industry. You can ask for past successful work.

Nothing is bad in it. But try to optimize your page with relevant keywords. Also try to build backlinks from some high quality websites. It will surely help you.