Can I ever go back to my old look? (from Reddit with photo)

Yes this can be done. We do this all of the time.  You must be over 25 and have a HAIRCHECK test to be sure that you know what your potential balding pattern will be so that when it is fixed, it will be part of your Master Plan for future balding if that is what is going to happen to you. The HAIRCHECK test at 25 will give you are a reasonable assessment of this possibility and allow you to go about this reconstruction with the power of knowledge.