Work through this tutorial for a really great explanation of what is going on in a covalent bond.
You can use this simulation to decide what shape molecules should have.
This is a great animation however, one thing to note…
Hydrogen bonding is NOT a type of bond. It is an Intermolecular FORCE and will be discussed during lessons on covalent bonding.
If you would like to see this a bit bigger, here is the link.