I personally enjoy taking amphetamines orally over any other ROA. I find the effects "smoother", or less edgey, yet just as strong and euphoric as taking them by insufflation. Taking them orally also takes longer to kick in and lasts longer, avoiding intense ups and downs of IV or smoking that leads to fiendish behavior. FWIW I find larger doses of meth or even d-amp somewhat comparable to rolling, without the empathy. YMMV.
I suggest taking some orally, on an empty stomach maybe 1/4 to 1/2 of a point (25-50mg), wait about 45 minutes to see how you feel, then maybe experiment with a few bumps to get to where you want to be.
Also, chew uup a few TUMS or take some baking soda dissolved in water before dosing. This will aid in absorption.
Also take heed to the warnings of addiction issues. Do not give in to the impulse to continuously redose.