Lingerie and sexy time

So I am quite young (20) and have only been with 1 person who I am engaged to and have a child with.

We’re starting to explore things a bit more like anal and stuff but I want to start wearing lingerie for him. I’m not sure where is the best place to get it as I can’t afford expensive things that cost £60 like in Anne summers etc. I was looking at SHEIN and was wondering if anyone has ever bought lingerie or sex toys from there and what their experience was.

Any help would be appreciated!