you have a lot of options:

1. find a LS/FC and ask for help. this game made is easy to help people, and they will
2. ask people personally
3. shout for help
4. just wait
5. level a healer urself

the lack of healer is just a matter of probability. pre-30, only 1 out of 8 classes can heal. post 30, only 2 out of 9 jobs can heal. of course there are lesser of them, ot to mention dps classes look 'cooler', and attract more players.

this is not the problem of the game, this is the design, and it working as intended. it is part of the community's interaction. if you cant tolerate the wait (which is prevalent in all mmo games) then you have to stick to single player games