What if the hash code of the genesis block (first block in the block chain) is changed? If so, what would happen? And if not, what are some limitations to it? The reason I am asking is because I just started getting into the cryptocurrency and am very interested in the cybersecurity aspect of it. Also, it's important to mention I don't have much experience in either but am willing to learn. Could someone advise some books/articles/guides? Greatly appreciated!
The genesis block is embedded in the chainblock (the hash of all the transactions since the bitcoin network was powered on). 
Now, from your question I deduce that you know little about cryptography and in particular hash functions and the blockchain protocol so I will try to explain myself in the simplest (and obviously incomplete) way possible:

Blockchain can be corrupted only if the majority of the network work to corrupt it, this is the (in)famous 51% attack.
If I modify the hash on my client, this change does not involve anything on the network as 99.999% of clients have a different version of the hash (the correct one) and the majority is the authentic. This is one of the main strenghts of the blockchain: the fact that it is decentralized and that transactions must necessarily be accepted and registered by multiple clients (at least 51%) to be verified. Very democratic isn't it?

In any case, I believe it is a good thing that you want to inform yourself about how the protocol works before throwing into trading. Many (too many) people invest in bitcoins or other crypto without even knowing what they are ... after all, when you invest in a cryptocurrency, you should do it because you believe in the potential of the protocol that supports it and not just for fashion or to make (or lose) money.

If you want to know more about bitcoin, the starting point could be to learn some basic cryptography, especially Hash: Section 8 for Hashing functions.
         Once you have become familiar with these concepts, I suggest you read the original publication in which Satoshi Nakamoto (we dont know who he/she/them is/are) illustrates the bitcoin protocol:  
a milestone of our time.