How to start with reverse engineering and hardware hacking

I have decent experience with website penetration testing but now i want to move to reverse engineering. I have the following questions: 1) Should i learn C language before starting to learn reverse engineering. 2) if i want to enter pwn2own and other related competitions what other skills do i need to have. 3) i want to learn about hardware hacking what all things are prerequisite for it

Please help me answer these questions

Thanks a lot

submitted by /u/Odd-Perspective1423
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from hacking: security in practice https://ift.tt/3pdlYT2