Would I be able to install (myself) my own choice of wifi card, RAM, second HDD/SSD and M.2 SSD?
Yes, you can unscrew the back and add your own upgrades, like storage, RAM or wifi card. Aluminium 2.5″ SSD mounting frame required for mounting 2.5″ disk is not included if you do not order 2.5″ disk, but you can purchase it from our web store.