I don't have enough experience to create such a guide.

My recommendation is to outsource your project via a freelance marketplace. You can find lots of IT professionals and companies there. And escrow payment allows to pay after the work is done.

You can try to broadcast live TV via Justin TV or UStream TV. Their players can be embedded onto your web-site.
You can also use your own streaming server. Please note that broadcasting TV without a licence can be illegal.

If you need live TV only for yourself, you can use Slingbox.