Hi Bane, I hope you are enjoying the game a little more now, stick with it!
It is one of my favourites. Here are some pointers in addition to what others have said.
1 - Try and get in the habit of two-handing your weapon when there is an opening to attack, this can increase your damage output significantly. The early enemies in the game leave themselves wide open after a simple block.
2 - Another useful move is to tap dodge followed by light attack. If timed correctly, you will take a jump back (avoiding an enemy attack) followed by a dashing attack forward. Very useful (The counter will depend on weapon type).
3 - You can acquire the Drake Sword without 14 Dex, at 12 Dex you can wield the shortbow. This can be purchased from the undead merchant (male) near the first bonfire in the Undead Burg. The longbow is more difficult to acquire, I wouldn't recommend it for a new player.
4 - In my humble opinion, do not start out trying to level up your strength or dexterity just to wield one particular type of weapon with a high requirement such as the Black Knight Sword. I would personally spend the souls on VIT/END and equipment upgrades first, using a weapon with fairly modest requirements. If you are going to go down the route of the Drake Sword, it starts out reasonably powerful. I would not spend dragon scales upgrading it however, as these are pretty rare.
5 - Kindle bonfires. To kindle you need to have a spare humanity and be in human form. This will increase the number of estus flasks from 5 to 10 (initially...)
6 - The most important advice that was already mentioned, try your best to avoid the temptation of looking up a wiki guide or suchlike, a massive part of the experience is trial and error and the sense of accomplishment when you succeed.
7 - Prepare to Die.