So to add to my last, if you are going to become a detectorist, a good, second-hand machine is probably the best option to take for starters. Also try to join a local club and get to learn the 'craft' from experienced diggers. Unfortunately, most if not all the clubs have waiting lists so if you want to start the hobby, apply to a club soonest.
However, I do not recommend digging with an online outfit called 'Lets Go Digging'. There have been serious issues with this organisation regarding flouting of Portable Antiquity Scheme regulations. There is still a powerful lobby in the archeological fraternity that is against metal detectorists and if abuse of the regulations carries on, it could spoil it for everyone and cause much more stringent anti-metal-detection legislation to further protect archeological sites, or at worst a ban on hobby detecting. We are fortunate in this country that the laws governing treasure are not too restrictive on the hobby but if the rules are abused this could all change. LGD certainly upset my local Finds Liaison Officer!
Frank