Hi and welcome to the forum from the uk,
You need to decide on what type of hunt you like and what type of finds you want to seek.
You may want to hunt the beeches most of the time so pick an md that will do that on both wet and dry sand/or you may want to hunt coins in fields and parks so look on here on the search button and type in coin hunting to read all threads,oryou may want to hunt woods,
I would pick what you can afford and decide on what you want to hunt and where and start the learning curve as we all have done.
You may ask for what ever advise and post what posts or threads you like on here the members will always help you as and when you need there advise so happy hunting and welcome here.
H I 