I'd prefer a sorcerer since it's the most straightforward to begin up with.
The normal thing to do, but after the a5 level, it's a complete mess. Personally, I go with fireball as a result of the leaf runeword, charged bolt or nova can also be options. When you are up to act 5, take the Ancients pledge. (Runes off from the quest, D2R Ladder Items or shield is available through Fara A2).
At level 30, you can respec frozen orb. You can also grind regular shenk/eldritch or Baal until around 45 levels. Develop an understanding for your Spirit and merc. Crystal swords found in cows normal receives 4 sockets at Larzuk.
Begin to scream, and you'll be completely destroying everything. Be careful when using resists. Your first stop should be Mephisto. You can grind him until you've got about the maximum res level and some decent equipment (he has a tendency to drop lots of items, including the oculus, vipermagi, and so on.).
Begin to build your own Set of MF.
You can upgrade to blizzard right now. Save your skill points for Energy shield, and then put the rest into the telekinesis.
Be sure to watch your pet, make sure he is current.
After that, farm shenk or eldritch to gain xp, if you need it. Baal until you reach 65. Don't begin hell without decent resists , and many full rejuvenations.
When you reach the level of Andy you'll know when you've got enough gear to move forward. If your merc has been installed and you feel like you're not so squishy, you'll be able to traverse hell in about 30 minutes without any issues.
Also, something that is controversial - use an exit macro.
This should cover the majority of the items needed to set up, D2R cheap items sale on p2pah.com.
For Ubers Smiter is most secure. If you are playing online, just purchase the torch, you don't need to farm for anything.
Summon Necro is extremely safe but it's also very slow until the enigma. Hammerdin is extremely risky at the beginning of hell too.