New to Allotments in Shropshire

Hello all
Next week we take over our first allotment!!

These are brand new allotments, we have to clear a few weeds away first.

What jobs would you recomend I do first plot is approx 10m x 6m how much manure should I put on and what type?
also
the allotment is in the country next to a farmers field, do you think I should post and put up chicke wire to stop rabbits getting in??

All help/suggestions much appreciated