Hi,

You have been given the best advice here i.e. wait until you get to UK. look for opportunities, gaps, study the system (taxes, finances, type of business, cost of running business etc) and depending on your skills, experience and determination, finances you can start your own business. Do you have finances in place to start your business immediately or urgent need to cater for family?
UK system is much more complicated, so you need to think of profits from day one, with all your expenses deducted i.e. tax, BILLS etc.

Do not be discouraged, Go 4 it!