Hi AJ, is that couple of hundred per week or per month?
The best thing you can do is work out how much you need to have a one bedroom flat. Check out how much one costs per month in your area, the add on the other bills such as council tax, gas, electric, water and food. Then make a list of all your incomings and outgoings you have already and see if wht you are left with will cover what you need.
Dont forget though that, when moving into your own place, there will be one off payments too such as deposit, any furniture you may need and a TV licence.