So sorry to hear about your loss Lunavix - I too am sorting out the estate of my mother, who also died last august.
It is a daunting task and there is lots to do, however, if you take it step by step, you'll get through it. I think that if you haven't done anything like this before (like me), it's good to get a solicitor involved as they know the processes and have done it a million times themselves.
If your mother left a will, then any legacies will have to be paid, as will any outstanding bills or liabilities. It's also a good idea to place trustee notices in the local paper and Estates Gazette to see if your mother had any creditors (i.e. if she owed money to anyone). These have to run for eight weeks and after that time, if no one has come forward, you'll be in a better position to progress with getting the estate tied up.
You need also to apply for probate as you'll need to be armed with proof that you are entitled to handle the estate.
Be warned, each stage can take no time at all, or it can take ages.
Do you have the death certificate? You need originals of this (they cost about £7 each I think) as you'll need one to send to various people.
Post on here any questions you have as many steps in the process don't make sense.
Take the first step today and the wheels will be put in motion. It will be a weight off your mind, you must have been feeling terrible for so long. Do you feel ready to handle the estate?