Well, you CAN attack and watch your guy go, most likely to get killed in the process.
There is a skill bar you use... in Guild Wars 1, the Skill Bar holds up to 8 Skills.
These skills are basically all your magic attacks, sword attacks, etc... They can be combined for maximum effect... but if you skill bar is completely random... your build won't exactly work out...
You have to combine your skills' effects and make them trigger together correctly.
Lets give off an example I use with my Main Character, a Necromancer-

The Skill Bar is to the bottom...
From left to right-
Spiteful Spirit -
Main Spell, Damage Dealer, Hits Foes Nearby Each OtherElite Hex Spell. For
21 seconds, whenever target foe attacks or uses a skill, Spiteful Spirit deals
37 shadow damage to that foe and all adjacent allies of that foe.
Arcane Echo -
Copies Spiteful SpiritEnchantment Spell. If you cast a Spell in the next 20 seconds, Arcane Echo is replaced with that Spell for 20 seconds. Arcane Echo ends prematurely if you use a non-Spell skill.
Reckless Haste -
Makes Foes Nearby Each Other Miss and Attack Faster, Thus Making Spiteful Spirit Deal More DamageHex Spell. For
12 seconds, target foe and all adjacent foes are hexed with Reckless Haste. While Hexed, they attack 25% faster but have a 50% chance to miss with attacks.
Parasitic Bond -
Cover Hex, In case of Hex Removal, Heals Me When Ends or RemovedHex Spell. For 20 seconds, target foe suffers -1 Health degeneration. The caster is healed for
126 when Parasitic Bond ends.
Desecrate Enchantments -
Damage Dealer, Harms Foes Nearby Each OtherSpell. Target foe and all nearby foes take
64 shadow damage and
21 shadow damage for each enchantment on them.
Awaken the Blood -
Self Enchantment, Makes Spells Even Stronger, I have no spells that make me sacrifice health.Enchantment Spell. For
20 seconds, you gain +2 Blood Magic and +2 Curses, but whenever you sacrifice Health, you sacrifice 50% more than the normal amount.
Signet of Lost Souls -
Energy Management, Health RecoverySignet. If target foe is below 50% Health, you gain
82 Health and
8 Energy.
Sunspear Rebirth Signet -
Resurrects Dead Party MembersSignet. Resurrect target dead party member at your location with full Health and 10% Energy for each Sunspear rank you have attained. This signet can only be used once per mission unless recharged by a morale boost.
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The entire game is based around using skills correctly together... so when you attack something, you are constantly using your skills to chain together and defeat the foes. Of course, however, you will have to change them around as some foes are resistant to this and that style of play.
In Guild Wars 1 there are 1319 Total Skills in game. All of which can be combined together one way or another.
You don't need to Grind to get to the max level, only to be prestigious...
Oh and yes, I reserved the name Flames of Zamorak for myself.