Congrats on your new car.
The secret to getting a super deep wet shine is less about the products and more about the prep to be honest. Autoglym products are good enough quality, as are Meguires, Auto finesse etc. But the trick is in the prep.
If you can make sure you get your paint perfectly clean, so pre-clean, rinse, 2 bucket wash, decontammed (iron and tar), clayed, polished (machine polish if you can) before layering (several coats) of the LSP (wax or sealant).
Its a bit of work, but thats what it takes. If you have a few hundred quid spare, get a detailer to do it and then just take the time to maintain it properly afterwards.
Good luck.