V8-5.7L,Car doesn’t start only when it wants to

I bought this camaro second hand obviously. It starts only when it wants to and with a super fresh battery sometimes I need to attach a jump start battery aswell. I have no idea but it seems like it's pulling too much voltage when I turn the key. When I turn the key I here a click inside the car and I hear another click I'm assuming from the starter but nothing turning over just clicks. Thank you for your time.

My car has 100000 miles.
My car has an automatic transmission.