Well done! You've done the hard bit. I was you two years ago so here are the things that have made a massive difference to me...
Ring/similar doorbell. Sky recently have done a contents insurance deal that comes with a doorbell cam, indoor cam, motion sensors and it all connects to an app on your phone. I feel much safer having it. The Sky one doesn't require a subscription (although obviously I am paying for contents insurance for the next year. But that's important).
Have a good relationship with your estate agent/landlord as much as possible, our agents have been brilliant even when my previous landlord was being hideous.
Emergency phone numbers, torches, batteries of all sizes, pens, basic toolkit including a drill and screw set.
Electric lawnmower- with a rechargeable battery. Feels so much safer than faffing about with corded ones or petrol tanks. (Pricey. But so so worth it!) Get a keter lockable bin store to keep outside stuff in if you don't have much storage or a shed. Loads of room and cheaper than getting a full on shed.
Make friends with your neighbours if you can- I'm not naturally an extroverted person so I found it really hard to do this but all my neighbours have been absolutely wonderful and they look out for me and I do for them. One of them even spotted me coming in from an extremely long few days at work and handed me a tub of Korean noodles. She was amazing!
Find yourself a decent local tradie who can do handyman jobs if you find yourself in need, but remember to report everything to your estate agent to protect yourself (and your deposit).
Check your credit score, get on the electoral role (that increases your credit score). I signed up to experian for a few months. Had to get a loan to buy the car.
Finally- buy some houseplants, get an Alexa/radio, lots of comfy blankets and cushions. I have the alexa on most of the time when I'm alone for a bit of company.
Lean on your support network. You'll be absolutely okay and come to love life on your own! 🥰