Yayyy Lorraine .. don't forget you could be eligible working tax credit with the disability element included , if you are working more then 16 hrs per week since you had been claiming ESA for above the required time. . And possibly the return to work credit off £40 tax free if you are earning less than £ 15,000, or the in-work credit if you are a single parent.
If you haven't already set these up(if you qualify) , then you need to do so very quickly. There is also a job grant of £100 or £250 dependant on the hours , and duration of the job.
Also if you have made your employer aware of your "disability" then you could use Access to work " for workplace adjustments :)
There are also linking rules if you find you cannot cope with the job due to illness. see Finding full time work on this DA factsheet here
DA "work for People who are sick or disabled" Hope all goes well
Links Direct gov:
Back to work helpAccess to workDisability Element of tax creditsRich
"The difference between 'involvement' and 'commitment' is like an eggs-and-ham breakfast: the chicken was 'involved' - the pig was 'committed'."