Pretty much this, your genes will dictate whether or not you will experience male-pattern-baldness. You could be lucky and only have your hairline recede or you could go full bald. The only way to fully restore your hair would be hair transplant surgery (although i have seen some really, really bad ones that look horrible), or you can opt to just use a topical like Rogain, which will only prevent hair loss at the crown, it does not work for your hairline.
I could write quite a bit about this subject but its dinner time and i am hungry! If i were you i would start using a Rogain like product to prevent a bald spot on the top and back of your head. Male pattern baldness varies and you may just experience thinning hair or you could completely lose your hairline or go bald at the crown, or BOTH.