google , as a search engine , not a company might be your best friend there

you could try and de-cipher these if you like

https://hackernoon.com/learn-blockchains-by-building-one-117428612f46

https://hackernoon.com/when-is-it-time-to-build-your-own-blockchain-f3be0a30b826

https://hackernoon.com/a-beginners-guide-to-blockchain-programming-4913d16eae31

https://hackernoon.com/building-a-blockchain-the-grey-paper-5be456018040

https://hackernoon.com/how-to-build-a-decentralized-application-that-scales-try-less-blockchain-b3e61b1d7bd6

https://www-01.ibm.com/common/ssi/cgi-bin/ssialias?htmlfid=XIM12354USEN

https://www.bol.com/nl/f/blockchain-for-dummies/9200000064972565/

https://medium.com/blockchain-education-network/what-is-blockchain-explained-for-beginners-5e747cea271

https://medium.com/swlh/the-blockchain-for-dummies-guide-part-1-b5ef8c085913

https://www.wiley.com/en-us/Blockchain+For+Dummies-p-9781119365617

take into account sites like hackernoon assume you have base knowledge of programming logic and syntax of a language (usually C/C++ or in the present days its fashionable to do python)

medium/hackernoon are great sites qua content but they have a limited number of "free" articles per day or week, otherwise you need a subscription (about $5/month i think) and

you're in for a lot of reading :p

but usually in all things you pray to the 1e100 for guidance (search on google, despite their lack of do no evil the search engine is still unmatched, IF you know how to skip the first page more often than not hahah ... and you gotta be a bit creative with keywords because those selproclaimed "blackhat" SEO's will try to get theirs on top based on most used words, often despite the lack of relevance)

if you're not really the type to work by yourself and you got more money than self-discipline you can try these :

https://www.accounting-degree.org/college-cryptocurrency-blockchain-courses/