Option 1:-
Stick around!
1-5 Outside Grobb/outside Upper Guk.
6-9(?) Either inside Upper Guk at the zone line or doing alligators further along towards the South Ro zone line.
9-12 Venture a bit deeper into Upper Guk, turn right towards a watery area. Outside, head out to South Ro and see if you can take out some orcs...bonus points if you can get a friend to play with.
12-15/16 Crocs in Upper Guk (further around from that right turn you made). Outside, crocs or orcs in Oasis.
16-20 By now either group in Upper Guk, soloing will be tricky, or continue to group in Oasis.
Option 2:-
Get out of there!
Make the dangerous low level run to Neriak, get a friendly passer by to bind you inside the entrance.
1-5 Newbie log area, skellies, spiderlings, etc.
5-9 Undead trio (they pull as singles) by the EC zoneline (as you see the EC zone line, turn left and follow the wall)... if a lesser mummy spawns, shout for help and see if a passer by will kill it.
9-12 North Ro Dervish cutthroats in a group, EC loose wildlife (lionesses, giant spiders, scarabs), Nektulos halflings if you're well geared.
13-20 Oasis/Upper Guk as above.
Option 3:-
Feeling crazy? Not too bothered about your skills? Head to Kunark, from the OT outpost run (sow and invis a good idea) to FoB and bind outside Kaesora. Do to level 22 (spell level) in the pit and Kurn's Tower
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Get a kind iksar to buy your SK spells, or pre-buy them before you go.
I might be slightly off on some of the Upper Guk levels but it's a rough guide, and Kurns will get slow after 20 but I'd stick it out if you can. Don't kill any badgers and you'll have a free roam of the basement to pick off skeletons.