Can I Get some D Tackle Help

there's no magic step.....it's all 'boring' fundamentals....

The first step is the small things.
1.Stance - coiled...does your current stance require that you have to 're-gather' your feet? Try a more 'coiled' stance that is compact, that is likely uncomfortable, but one that makes you want to get out of it as fast as possible .....shoulder width, no more than 6" stagger, tail in the air.
2. Start - your 'get off' should be a sharp, short 6" drive step, anything greater, leaves you susceptible to pancaking or re-gathering your base.
3. Hand Placement quick sharp punch to the chest of the blocker INSIDE! Get inside and you'll have the leverage to win
4. Explosion - hip roll, just like a clean or dead lift, you've got to pop your hips forward to BANG! and explode from the ground up (into) with your hands.
5. Extension - once your hands are placed and the hips roll, extension occurs naturally, as you'll bench the blocker away (like a power press).

from the extension you will start a bull-rush (keep feet moving).....
from there, you can use rip, swim, counter, club, etc......

Bottom line, if you're first off the ball, you'll win (or break up the play)....if you're last off the ball, NOTHING you do will really matter as being the FIRST line of defense.