@k00b shared this recently: #200522

To get an overview of Script and its corresponding opcodes, take a look at https://en.bitcoin.it/wiki/Script

For an easy execution environment, check out the online ide scriptwiz (https://ide.scriptwiz.app/) made by Burak

btcdeb (https://github.com/bitcoin-core/btcdeb) is also a good way to get a better idea of how opcodes manipulate the stack

From there I'd check out miniscript, which is still far from having a friendly developer environment but maybe worth learning about in the longterm. Here's a good video to learn the basics of what it is https://www.youtube.com/watch?v=_v1lECxNDiM&ab_channel=LondonBitcoinDevs

For applications, the Liquid ecosystem has some good examples. Check out the Fuji whitepaper for an example of complex scripting (https://vulpem.com/synthetic-asset-smart-contract.pdf) along with Liquid's non-custodial options (https://blockstream.com/assets/downloads/pdf/options-whitepaper.pdf)

You may find this thread helpful:
#43271

definitely check out base58

https://base58.school/

Nice progress :)

Here some resources:

https://betterprogramming.pub/the-bitcoin-script-language-e4379908448f

https://en.bitcoin.it/wiki/Script

https://bitcoindev.network/bitcoin-script-101/

https://github.com/openblockchains/programming-bitcoin-script

https://learnmeabitcoin.com/technical/p2sh

https://github.com/BlockchainCommons/Learning-Bitcoin-from-the-Command-Line/blob/master/09_3_Testing_a_Bitcoin_Script.md

https://github.com/BlockchainCommons/Learning-Bitcoin-from-the-Command-Line/blob/master/09_0_Introducing_Bitcoin_Scripts.md

Once youve learned the basics I'd check out miniscript. It's a subset of the language with tooling for usability and safety