Two things...
If the lights do not even dim, it is more likely the neutral safety switch. Try starting in neutral and wiggling the shifter a bit.
The starter upper bolt can be hard. It require a 6-point socket of the correct size about 36" of extensions with at least one wobble extension. If you do not use a battery or air impact, you will need the car high enough to apply a lot of leverage...either through a long cheater or a string leg.
My first took a while but was not terrible using hand tool. My second used a battery impact and could not have been easier...3 seconds on forward, 3 in reverse...rinse and repeat until it breaks loose.
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