new to sex toys need advice on anal toys

So I'm a guy in my late teens and I've been experimenting with anal play recently, so far I've used vegetables and pens to explore but find that its not safe enough etc so I am looking to buy a sex toy. It will be just for myself as I'm single atm (sad times :( ), I still live at home (in the UK) with my parents so preferably the delivery would be to a collection point (you know one of those services where you can pick up from your local petrol station or something) so if anyone knows about that it would be great to get some advice. I would also like an idea of whether to buy a prostate massager or a butt plug or a dildo. Preferably below £25 but im flexible. Any related advice appreciated as I'm very new to this! Thanks in advance :)