Sorry to hear about your job.
Your first hurdle is new business. You need to look at how you are going to advertise and then maybe get talking to event organisers.
Marketing your business with free samples/tasters to event companies is always a good shout (but you will really need to impress).
There are lots of local business support groups who offer free advice on getting started.
I'm going to make the rest of my life the best of my life.