Wordpress - Need extra sidebar added

I have a website online www.gethookedoncrochet.co.uk which is with Wordpress. I am happy with all that is there apart from the fact that I would like sidebar 1 & sidebar 2 to sit side by side to the right as you look at the screen & not one under the other.

I know that you can add a PHP code (I think that's what its called) & from looking online via wordpress.org I can see where it has to go but I can't figure out how to do it.

I would like it done ASAP. I am a prompt payer.