First read the Satoshi's whitepaper. Then learn about the basics. I assume you know what P2P is. If not learn. Do you know what hashes are? If not learn.  Do you know what is a one-way function? Hell, do you know what a function is? Start with these.

Watch youtube videos on cryptography. Once you get a rough handle on the concepts of cryptography then wallets, transactions, will start to make sense. It will become intuitive instead of this mass of FUD.

There are many excellent youtube videos out there that cover this.