Thank you for your reply! I would take it to a bikeshop but I cannot afford the prices they are charging....Also, I wish to learn a bit myself about my bike. The only stock specs I could find are:

Frame
Full 4130 Chromoly

Fork
Redline Chromoly with IS Disc Mounts

Crankset
Redline Monster chromoly arms , ISIS, hollow spindle

Bottom Bracket
ISIS 68mm X L108mm

Chain
KMC Z410A

Cassette
16T

Pedals
Polycarbonate Platform withStraps


Assuming I have an empty drivetrain, what all would I need? Could you link me to a bottom bracket that would work as a starting point? Thank you so much!!!