I need help

What are you having trouble with?
Whats your class?
Where are you?
Your a little vague right now.
(I'm not trying to be mean, just asking for a little more info.)

I am a lawful good paladin and i am just starting the game

OK.
Do Candlekeep and talk to the sages, as they basically serve as a tutorial.
The best thing you can do for yourself is to save as often as you can; nothing is more frustrating than beating an extremely hard part of the game, only to have to reload after a cheap death.

In combat, bows are amazing in this game, especially near the beginning. Imeon is a great companion to have with a paladin. (great choice for your first class by the way.)
Use the environment to your advantage. This isn't like most games nowadays where you can just rush straight into every battle and expect to win. This game is HARD. If you see a narrow area, clog it with your best fighters, equip everybody else with a missile weapon, and fire away.

Make good use of your formations, as they can save your life.

Don't be too cautious with your money, as you will have 80k+ by the end of the game easily, not knowing what to spend it on.

Have fun with your party selection. Try to fill the basic needs of a party (thief, fighter, mage, cleric) and then pick whoever you want. (Minsc is HIGHLY recommended.)

Congratulations on buying one of the best games ever. This is the game that will make you skip school, work, or whatever else you have planned to play. Have fun!
(If you like this, then I recommend Planescape: Torment if you want an excellent story, or Icewind Dale if you are craving a dungeon crawl)

Talk to everyone and avoid fights that can be avoided. Check your journal often ('J'). So you plan to play solo? I believe not, so it's good to follow Gorion's advice and goto Friendly Arm Inn as soon as possible.

BTW some early enemies are pretty tough. Don't quit the game just because of that. Good hunting!

This is a game that gets much easier as you level up and really learn your various party roles. Never, never, never have non-fighters such as mages and other weak Armor Class party members attack in melee! Have your fighters on the front line to protect weak members. Don't be tempted to have only fighters as the skills of thieves, clerics, and mages will prove to be invaluable in other ways. A successful mage cast of a spell like Horror or Charm Person will make hard battles incredibly easy! This means learn you spells and what they do. Don't just use magic missle. A cleric will keep the party healthy without having to rest over and over again at inns. Also, use Entangle on hard enemies so you can pelt away at them from a safe distance; this is a very good spell for early on. Without a thief that can detect traps and open locks, you will find yourself in a world of trouble when exploring the various dungeons of the game.

A good beginner's party could look like this

Fighter
Fighter
Fighter
Thief
Mage
Cleric/Druid