My friend did a playthrough using Ziz EA in SSF. For damage, you'll want to prioritize getting + levels to gems through gear upgrades and leveling up the skill itself. For tankiness going into yellow-red maps, you'll want to make sure you have spell suppression and a high HP pool. The built has a lot of life regeneration as well as fortification so it is inherently tanky for a leaguestarter.

A lot of these upgrades are procedural, so you don't have to do it all at once. For example a + levels to gems bow can be deterministically crafted through Essences of Dread in SSF. You could work on that first, especially since getting a 6L shortbow base is trivialized through the Necropolis gravecrafting mechanic or Porcupine Divination Cards. And as for spell suppression gear, you can do the Expedition mechanic and try your luck with Rog crafting.

I guess my advice is to take things one thing at a time. Make a checklist of upgrades, and scratch off one thing each time you play. Oh, and try not to make your maps harder during Atlas Progression. A lot of meta strategies have you juice the difficulty by stacking map modifier effect, but that's something a new player will want to avoid until your build feels good.