Roper top load washer machine wont cycle, and also makes a buzz nosie

Hi there, just looking for answers before I spend a lot of money on someone to come fix my washer. It is a Roper top load, and it will fill with water on initial cycle and start doing the wash/agitate cycle, but will not advanced to the next cycle, the knob stays in one spot. If I manually put it to drain It makes a weird humming/ buzzing noise and does nothing. When I turn it to the spin cycle, it will drain completely, but wont spin after that point, like it is stuck in the same position, any pointers or tips will be appreciated thanks!