Can you do a transfer without mining a block?

No, it needs to be included in any freshly mined block.

Can you include an unlimited amount of transactions in a block to minimize the wasted energy?

No, it’s hardcoded to around 1 mb and since the average is 300 bytes, that translates to ~3000

Can you mine a Bitcoin without wasting an immense amount of energy?

No.

So, by math, you take that immense amount of energy and divide by ~3000 transactions.

You can’t just take in consideration the 3 watts used by your computer in the 300 milliseconds used to submit the transfer, need to consider the whole network

I would be happy to learn if it’s possible to transfer them without including the transaction in a block, that would be groundbreaking and then the electricity used would be 10000x less