Need tips for launching.

Forget about ET until you can afford tires.
Concentrate on MPH. Let that number console you.
Check the Mph to minimum ET( with full race suspension) chart. It will indicate what might be possible. Compare that to what your car did. Calculate the cost to achieve the difference. Make a decision as to whether or not it's worth it to you to chase that ethereal target. A few thousands might get you 50% of the diff. After that it gets really expensive.
I was happy to see 93MPH(1/8th) on my slip.
The street suspension could only muster ; 2.1 60ft. and 7.92 et.
I'm happy knowing that the car has the potential to be waaay quicker.
But to me it's not worth spending thousands and thousands to make it so.
I'm a streeter.

In answer to your question tho, baby it out. If you have a vac-secondary, slow it down. Vary your launch-technique little by little. When mph tops out, park it.