Handwashing in accordance with Jewish law

I have started to get closer to Judaism and I am completely confused as to when one has to wash hands.

Dear …!
There are several reasons why one might be obligated to wash one’s hands. We will try to explain them in organized fashion.
A. Hand-washing before a meal. For every meal that involves bread, one must wash hands from a vessel such as a cup or a special jug; it is also possible to use a bowl or something similar, and one must pour twice on each hand. One has to recite a blessing on this washing. It is important to learn all the laws of hand-washing. It will take some time to learn and get used to it, but it is important to practice this important mitzvah; the sages said that whoever is careful to fulfill it according to all its laws will merit wealth.
B. Hand-washing before prayer. This washing is for cleanliness and there is no obligation to use a vessel. In case it is not possible to get water, one can only wipe one’s hands with a cloth or something else that cleans.
C. After touching or being likely to touch something unclean, such as when leaving a restroom, touching the floor, or a surface of one’s body which is normally covered and where there might be an accumulation of sweat, and the like. In case it is difficult to wash with water, one can wipe one’s hands with something that cleans.
D. Hand-washing when getting up from sleep. The sages revealed to us that after sleep there is an unclean spirit attached to the hands and that if one touches the hollows of the body [mouth, ear, nose, eye, navel, open wound], or food, this spirit will cause the person spiritual and physical damage. To remove the evil spirit, one must wash hands three times in this order: right hand - left hand - right hand - left hand - right hand – left hand.

Shulchan Oruch, section Orach Chaim, chapters 4, 92 (§4), 155-165