As someone who has been running for around a year now, here are some of the things I really recommend you get
A running belt is perfect for being able to bring your phone and keys and things, without risking dropping them
Running Belt For Phone
A good pair of shorts is essential for a happy run. Decathlon has so many options that don't cost a fortune.
Decathlon shorts
Adidas is great for running shorts that look good and are comfy
Adidas shorts
Decathlon has loads of cheaper sports bras that provide good support
Decathlon sports bras
Leggings are great for winter, when it's a bit colder and you still want to run without freezing.
Womens USA Pro Tights & Leggings
Obviously you need socks to run, and Nike has ones with a decent amount of cushioning. I would recommend getting black though, since white can get mud stains.
Socks
Some tight shorts are a basic staple, and these ones from Nike are pretty good
Women's Nike Pro Shorts
A long sleeve top or jacket is good for winter, when it's a bit colder
Womens Running Tops | Long Sleeve, Half Zip, Vests
These are basics but necessary for spring/ summer. Make sure you get sports ones so that they are breathable enough
Running Tops and T-Shirts
These are essential for those hot days when you are drowning in sweat. They give you a bit more ventilation/ air circulation (I don't really know what the right word to use is)