How does one include the transaction in the block manually or submit a request to a specific miner to mine my transaction and confirm it?
Anyone that control mining pool can include the transaction that they like and when the mining pool mine a block, the transactions the mining pool included into their candidate block will have confirmation.
Your txid is enough. Use the txid of your unconfirmed transaction on a free accelerator like:
https://www.viabtc.com/tools/txaccelerator/.