Okay So... No Certification And no idea where to start... Maybe Pre-exams?

well i am an 18 year old who has been messing with computers/electronics sense about 3 years old.... but i don't really know what my strengths and weaknesses are lying in the General Computer Sci or Consumer Tech categories... i am wanting to find a free way to test my likelihood/ability of going into each Technology field... and to see what i do already which works for what i want to accomplish in my life. i have a Questionnaire a Google Doc (which has a link to my resume, which gets updated contently). the link is #-Link-Snipped-#.

P.S.
thank you in advanced for your time and effort!

Sincerely,
Marty M.