Get some lessons with an
orchestral bassist. Do not try to teach someone about bowing until you are VERY confident about your technique. You will do them more harm than good.
Once you know how to hold the bow keep these ideas in mind:
1. Use a sticky rosin such as Carlsson or Nymans
2. Play close to the frog
3. Play closer to the fingerboard especially on the E string
4. Play quietly
5. Use the weight of the bow only - No pressure
6. Hold the bow as if it were as fragile as an egg
Once you are comfortable with this then you can work on advancing your technique.