Ethereum Platform/Network Explanation and intuition

I'm a complete noob and I am sorry if this question has been asked before. I would be grateful if people could forward me to further resources that would help me understand better.

I have been studying Bitcoin and its blockchain and it was straightforward for me - there's a blockchain and a coin which is the currency that is used on the blockchain.

Now, I understand what Ether and Ethereum is - Ether is the currency that is used on Ethereum, which is a platform/blockchain/network. Now, I don't completely understand exactly what is the difference between a platform and the "network" in terms of Ethereum.

How I understand it is that the platform is a website like etherum.org where people can post their smart contracts onto the Ethereum blockchain or use others' contracts.

Is the "network" basically just the same thing which is the bitcoin network - a big group of nodes verifying the transactions?

If somebody could explain in plain english what the difference between the Ethereum platform/blockchain/network is I'd be grateful.