Re: skelliemancer tips; restarting d2,=
Nightfish's guide is the definitive guide for the Skeleton-based Necromancer.
Once you've completed that (at around clvl60), the Dim Vision variation is probably the best way to go for a first character. It's just about the safest and easiest build in existence. (Arguably the most boring too.)
Nightfish doesn't go into the post-clvl60 variants too much, but basically the DV variation is just maxed Dim Vision with everything after that into Bone Wall, for the Bone Armor synergy.
One thing I like to mention to new Fishy builders is that shopping is your best option for obtaining wands. A +3RaiseSkeleton/+3SkeletonMastery wand can be shopped in A1 from the very beginning and can be used starting at level 3. (+2RS/+2SM can be used at lvl 1). Wands are very cheap compared to their relative power. A +3RS/+3SM wand sells for ~7K gold. A +3Summonig sells for ~16K gold.
I managed to shop a +3RS/+3SM/+2BA wand (took about half an hour) that I now use on all my up-and-coming Fishys from clvl3 to clvl45 (when +3Summoning wands can be shopped/used).
Also, the best Shrunken heads for a Fishy (i.e. with +RS and/or +SM) drop in the early/middle parts of A1 (Stoney Field, Dark Wood, Black Marsh). I would recommend "farming" these areas for good heads. I managed to find a +1RS/+1SM, a +2SM, and a +3SM head (all <= clvl3 req) in a single run through those three areas. Of course "Your results may vary", but as with shopping, enough time/energy spent on it will eventually put the odds in favor of your success.
So as you can see, with some patient shopping and farming, you should be able to head into the Monastery with a minimum of +3 to RS and +3 to SM. With that kind of "head start", it's a cakewalk all the way to the end of Norm. And by then, you should be able to make a 3PDiamond shield, which should cover your resist needs through the end of Nighmare. Things will slow down in Hell, but with high level Dim Vision and judicious use of other curses (Attract/Terror), it's still pretty much a cakewalk.
P.S. I have to respectfully disagree with Zallus re early skill point allocation of RS.vs.SM. The defensive benefits of a large number of minions greatly outweighs the offensive benefits of stronger individual minions. I've run both ways, and I find that, even though each individual skeleton is statistically stronger, my "actual progress through the game" is faster with highRS/lowSM than with lowRS/highSM.
P.P.S. Read the RIP thread if you want to learn from others' mistakes.