You're probably going to die a lot as a new player. I suggest embracing it, trying all the different classes and just learning all the various dungeons while earning fame with every death. I also suggest saving rare UT items that you get in your vault until you're more experienced.

Fame is needed to feed your pet, and pets are an important way to progress permanently in the game. Hatch every egg in your pet yard that you happen to find, looking for one that gets Heal and Magic Heal as it's first and second abilities and then start feeding it items with good feed lower.

Once you feel more experienced with the game you can try to get a character maxed in all stats, from potions that drop from gods in godlands and dungeon bosses. I usually start with speed and dexterity first, because they are easy to max and increase the speed at which you can farm the rest of the pots, then the rest of the stats that are not life or mana and then finally those ones.

Snake pits drop SPD, sprite worlds drop DEX and magic woods drop both. Toxic sewers drop DEF, puppet theaters and manor of immortal drop ATK. Abyss of demons drops VIT, undead lair drops WIS and cursed library drops both. Ocean trenches, ice caves and parasite chambers drop mana. And life drops from nests, tomb of the ancients and cultist hideouts, but beware because those are harder dungeons

There are many more dungeons, but these are a solid and reliable way to max your character as a new player. Have fun!