Your luck in finding a guild notwithstanding...
I beg to differ. If WoW is unique in the MMO world for one thing, it is how soloable the game is. Now, paying a monthly subscription to play a MMO solo is a tad stupid. But...
With the correct class choice, it is actually quite easy to solo the game up to level 50 at least. On the alliance side it is a tossup between Hunters and Paladins which is te most braindead class to solo with. Well armored Classes that can self heal (druids/paladins/hunters) or have pets (hunters & warlocks) do well. Shadow specced priets take experience, but have such good crowd control abilities that they do really well.
Once you have chosen a robust class to play solo, then you need simply to be aware that there are at least 3 zones in the game for questing at any particular level. For example, between levels 20-30, you can quest in Ashenvale, the Wetlands or Duskwood. This knowledge allows you to pick and choose which quests to do to level up, so you can do mostly green and yellow (i.e. easy) quests, and defer the hard quests until you are capable.
You *will* need to group to de elite or dungeon quests however : join the LookingForGroup channel and join pickup groups to do elite, or dungeon quests.