We're using 2Degrees Fibre at our office (200/200 unlimited UFB) and have a MikroTik RouterBOARD RB2011UiAS-RM router wich is great.
We've just be allocated a /29 subnet beside our existing IP and the 2D engineers have not used MikroTik before so can't offer assistance on setup. 

Can someone please provide me, a pointer in which direction I should research to get this up and running?

Thanks