Agreed with Age. Playing as a monk is challenging. When I started playing a monk, I made sure I played quests and missions again (my 4th character). Some of these were boring and tedious but I made sure that I did them to learn how to play a monk. I took henchies along because they don't yell at me when they die

Once I got used to it, I made sure that I left monk henchies out of the party to see if I can cope as a healing monk. So far so good, I've just got ascended and finished The Dragon's Lair mission.
I spend abit of time reviewing my skillset and trying out combinations of spells to see what works for me, to heal/protect efficiently while maintaining reasonable energy.
As a monk, it has changed the way I play, compared to playing a warrior, mesmer or ranger. I pay little attention to what is going on (e.g. who is the called target, who is charging at us, etc.), my eyes are firmly glued to the party's health bars during combat. I try hard to resist joining the battle and stay behind and out of harms. I do miss attacking and making the kill, but making sure the party is protected and in good health is just as rewarding.
Things does get very exciting when you have try and keep a full party of 8 alive, especially when there are mobs all over the place, and team members are being degen and constantly taking hits.