Though I will definitely try to learn D&D, I figured I might as well put something out in the case that it's actually salvageable.
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The characters will start fairly similar, with somewhat low stats. However, depending on their race and class, their stats will grow at different rates.

[hider=Base Stats]
HP: 30[color=8493ca](including +10 from base Body)[/color]
MP: 30[color=8493ca](including +10 from base Mind)[/color]
Body: 5[color=8493ca](2+ HP per point and physical damage)[/color]
Mind: 5[color=8493ca](2+ MP per point and magical damage)[/color]
Defense: 5[color=8493ca](Reduces physical damage by 3 for every 4 points)[/color]
Resistance: 5[color=8493ca](Reduces arcane damage by 3 for every 4 points)[/color]
Skill: 5[color=8493ca](Increases hit and critical chance)[/color]
Speed: 5[color=8493ca](Increases evasion and damage priority. If X times higher than your fastest opponent, allows for X actions that turn)[/color]
Luck: 5[color=8493ca](Lowers chances of receiving a critical hit, increases status procuration, and allows you to find better items.)[/color][/hider]

You roll 7d6 and assign each result as you wish to a stat[color=8493ca](excluding HP and MP)[/color]. Every level, you roll 1d6 for each stat. If the result is 6, increase the stat by +3. 4 & 5, +2. 3 & 2, +1. If you roll a 1, there is no increase.

[hider=Combat]When attacking, you roll 1d20 to see if you hit. The result[color=8493ca](1d20+Skill-enemySpeed)[/color] must be 2< at close range[color=8493ca](1-2 spaces)[/color], 3< at medium[color=8493ca](3-6 spaces)[/color], 5< at long[color=8493ca](7-10)[/color], 8< at sniping[color=8493ca](11-13/max range)[/color].

When you hit, you roll dice depending on the weapon and add Body or Mind if it's physical or arcane damage respectively. Then, it is reduced by the enemy's corresponding defensive stats. [color=8493ca](EX. A 1d6 Dagger with 10 Body, the enemy has 12 Defense. 1st result is 2, 2+10-9, so the enemy takes 3 damage.)[/color] If you choose, you can choose to go for a critical hit, doubling the damage before increasing it by another weapon roll. If you do, roll 2d20. The result[color=8493ca](1d20+Skill-enemyLuck)[/color] must be a 20 or greater for it to succeed[color=8493ca](From before, successfully crits. Result is 4, 2*3+4, so the enemy takes 10 damage instead of 3.)[/color] However, failing results in a miss.

There are also status-applying attacks. The stat that resists the status varies on the type[color=8493ca](Stun resisted by Body, Fear resisted by Mind, etc)[/color], but the procuration chance is always 20 + attacker's Luck. I'm trying to think of a better way to represent this, but I guess a d100 could work.[/hider]

This is what I've got so far, so if you've got any comments or criticisms about it, feel free to say so. It kind of feels a bit complex, but I'm not sure how to simplify it, if it is.