Hi Kate,
I am sure you will love running once you get it into it, it's good you have found a new hobby!
My personal view is that running when you are carrying extra weight can have a couple of issues. I'm not trying to discourage you so hear me out

Because of the stresses that running places on the body, the risks of injury and unwelcome effects are increased. Every step is three times your body weight running through your foot, ankle, knee and hip. And you do that step after step after step. This causes loads of injuries for people (me included) whether you are carrying extra weight or not, so it's important to first prepare the body for running.
The other issue with running when you have weight to lose is that it becomes very difficult very quickly. This is from personal experience and that of others! It can be easy to want to give up and think that you can't do it, which is obviously not very motivating for you or going to give you the feel good factor.
So...
If you wanted any advice I had, it would be to prepare the body for running by carrying on your weight loss through non impact activities. I don't want you to get injured and then not be able to do anything so to lessen this risk getting more weight off by doing things which are less risky would be a great foundation for you. This does two things, firstly, it lessens your bodyweight (for every pound you lose, that's 3 pounds less with each running step) and secondly it will it will help build your fitness so that when you do start to run, you're going to enjoy it more than you would have.
When you do decide to run, I would aim to run for a 1 minute, walk for 3 minutes and alternate that for a while. Obviously warming up and stretching out afterwards etc. will help reduce injury but you might find easing into it like that is better for you than just trying to go straight into it 100%. There's plenty of time for progression ahead but building the foundation of fitness and reducing your weight will be really help your running in the longer term. I would probably advocate running as a good weight maintainer but if you have several stone to lose, it might be safer to try activities that are less impact such as walking, cycling, swimming, etc.
Does that help at all? Let me know if not!
Thanks,
Neil.