Deeper understating of blockchain forks. Ive spend the last 8 months digesting everything and I have a lot more to learn. Is it possible to use Dogecoin on Litecoin network without converting  through an exchange? I assumed  you could since their both  Scrypt and one is a fork.  

Also,  I’d like to go learn more.  I’ve done G code programming for CNC machines but that’s it .  So much info out there,  What would you recommend for learning the basics.
Thanks
Short answer is no.  

Forks

A fork can mean that you "forked" the code on a repository, meaning you copied it and modified it for your own use case. It can also mean that the blockchain network itself "forked" when it split the blockchain and the network adopted two different chains and usually code and rules as well.


  Is it possible to use Dogecoin on Litecoin network without converting through an exchange?


Because two different blockchain networks have 2 different blockchains, they have different sources of truth.  One transaction on the forked chain isn't necessarily considered valid on the other (especially if they happened after the fork) because they are reaching consensus on separate blockchains.  See this related question: Can I do a replay attack to spend my testnet bitcoin on the mainnet?