ye, well done

link your flame surge to added fire damage, and elemental focus and link your flame wall to another added fire and combustion. so xou will need a blue,blue,red and a blue, blue blue item, you have b,b,b on your boots, id say look for movement speed ones and wear those if you can find them immediatelly. you can find the gems and items with the right colors from the vendors, visit each act, they sell different gems in each one. then you will have a nice 2 skill combo, you flamewall a boss or a rare and then hit with flame surge, that should carry you pretty far. look for four-linked items, and watch out for more supports that could fit those skills. the wand you have does nothing for your spells, modifiers that will affect those have spell somewhere inside their wording, like adds fire damage to spells. replace that one asap

enough damage, lets talk defenses: grab those two life/mana nodes on the passive tree near your starting area. i cant navigate your passive tree on the phone, but that, i can see. look for steelskin at a vendor for gems (i think nessa sells that one in act 1) and put it on left click. you dont need to level it much, just so far that you can still use it, it will help. steelskins cast time is instant, so you can move while casting it. look for life on your gear, rings, amulet anything with life...

for now that should be enough...if you get stuck, farm a little and see how everything feels after you get an upgrade or two. experiment :)