For a new player a magicka Templar is probably better than a sorc.Just wear all light and use Puncturing Sweep +some stuff from level 1 to vr14 than use Puncturing Sweep some more. Very good in the next patch at least for solo pve. The Sorc is great and ultimately better at soloing but I think It's slightly more involved as it require using 2 buttons and 3 toggles instead of just one button.
all are good for soloing (except sorc...cant get good lvl 20 build...) , templar maybe 101% best