There are a lot of different options out there so do your research before you buy anything. Different options may be better depending on the size of your baby, how frequently you intend to use the carrier, how long you’ll be wearing it for, etc.
If you have a local sling library then that’s a great place to start for help, advice and to try out different carriers. Have a look at ukslinglibraries to find your closest one.
There are also on-line sling libraries that you can rent slings from to try out different types before buying or if any of your friends have a carrier that may be suitable then you could ask to give it a try.
Sling consultants can also provide advice on what will suit you best.
Websites to take a look at for more detailed information are: