Hi Victor Francisco!
It’s nice to see your interest in climbing and mountaineering, good for you! However, learning basic rope management in an alpine environment will be tricky for you if you do not already have friends who are willing to take you out and teach you.
Take courses if you can, either with the guiding companies or SAR parties. Klifurhúsið offers basic roped climbing courses in the spring.
Hang out in klifurhúsið and get to know people, they will be more willing to take you out if they know you, rather than waiting for them to reply to post like this.
Isalp rarely organizes trips and teaching anymore and most people who do go on our trips are expected to be able to take care of themselves.
Don’t give up and good luck!