Advice/Help with build: Life Leech Two Handed Sword Cyclone

Definite improvements over your tree
More life (you have 110% increased maximum life from tree, whereas my suggested tree has 210%, which might still be a little low for some people's tastes)
Less elemental resistances (get it from gear, not your tree)
No Soul of Steel (endurance charges + Unbreakable is plenty of physical damage reduction)

Possible improvements over your tree
No leech nodes in Duelist (you need Warlord's Mark to reliably and comfortably sustain endurance charges, in my limited experience, and that takes care of those needs for you)
Resolute Technique (definitely saves you a headache. Undeniable isn't really worth it over Unbreakable or Unstoppable in my opinion. And it's a pretty big DPS boost up through yellow maps. I'm only saying this is a possible improvement because I think that with endgame gear crit might be better)
Bleed nodes (I'm pretty sure this is the right decision - with Sunder, Crimson Dance takes you from 40k bleed DPS to 160k, which is pretty amazing; even if you only get half as much bleed DPS from Cyclone, it would work out to a 60k DPS boost - but because I'm not completely certain I'll include it here)

Modifications to my suggested tree that you may want to make, if you have your heart set on speccing for leech without going Slayer
This tree trades out bleed nodes for leech nodes. You're losing out on a lot of bleed DPS, but your leech/second cap will go from 20% of your maximum life to 33% of your maximum life.

I can't access Path of Building (current download here) at the moment so I can't modify my build into the one that I'm suggesting for you. So I'll just link my build and allow you to make the necessary changes (Tree: adjust passive tree to what I suggested above; Skills: change Sunder to Cyclone; Items: change axe to sword) yourself. To do this, open up a blank build in Path of Building, go to the Import/Export tab, and input this Pastebin link. If you need help using Path of Building, check out some YouTube videos.

Leveling tips - Acts
At Level 44, trade for a Rigwald's Charge. (poe.trade is a great resource which you effectively need in order to play the game through yellow maps - there's a reason most people don't play Solo Self-Found - so you should get at least a little familiar with it.) Pick up Blasphemy and Warlord's Mark from Siosa, and equip them when you get the chance. If you're running into DEX/INT issues, don't be afraid to drop a passive point into Expertise/Ancestral Knowledge. At Act 8 or so, trade for boots with 25% movement speed, life, and resistances; rings with life and resistances; a helmet with life and resistances; gloves with life; and an amulet with life. At Level 66, trade for a Kondo's Pride.

Leveling tips - The Labyrinth
Speaking candidly from one scrub to another, you should be able to comfortably tackle Normal Labyrinth by Level 45, Cruel Labyrinth by Level 65, and Merciless Labyrinth by Level 80. Uber Labyrinth is kind of brutal so don't be afraid to hop into a global chat and ask for someone to "carry" you (remember to offer to tip 5-10 Chaos Orbs). For your Ascendancy Passives, take Unflinching -> Unrelenting -> Unbreakable -> Unstoppable.

Leveling tips - White and yellow maps
When you beat Act 10, trade for a 5-linked rare Glorious Plate with life and resistances. Then respec your passive tree so that you have ~4.5k life. (If reshuffling passive points isn't enough to push you up to ~4.5k life, trade for some item upgrades with more +maximum life on them until you get close). As you level during maps, continue filling in the build's life nodes until you have them all, then go back to picking whichever nodes you want next. Once you start mapping, buy the maps that you can't find yourself on poe.trade. It'll save you a fair bit of trouble.