Help from HMRC
Her Majesty's Revenue and Customs provide lots of handy information and tools to help people who are starting their own business, including becoming a Shared Lives provider.
They've got lots of generic information about Starting Your Own Business.
If you want more in depth help, HMRC run webinars, where you can book on to a course to suit your requirements. Find these at www.hmrc.gov.uk/webinars
You might also want to receive regular updates from HMRC by following them on Twitter, just search for @HMRCgovuk
A tool is available on the HMRC website to provide guidance on how much money to set aside for Tax / National insurance. The Ready Reckoner calculator tool can be found at www.hmrc.gov.uk/tools/sa-ready-reckoner/index.html
There are also a number of mobile Apps which you can download to your smartphone. They cover a range of subjects, and you can browse what's available at www.hmrc.gov.uk/softwaredevelopers/mobile-apps/record-keeping.htm