HELP!: Step by step Guide to make my bitcoin Completely Private??

Was orange-pilled about half a year ago and have been stacking daily with everything I've got. Even started working another job to get more sats. Problem: I live in NY (only Coinbase and Gemini work here) and have been buying bitcoin on Coinbase Advanced Trader (Formerly Coinbase Pro). I then send it to a hot wallet (which does not use unique addresses to receive), then cold storage(unique address every time and have only ever received bitcoin to cold storage device ). I noticed my privacy score on blockchair was abysmally low and so I started adding a step and send it from the first hot wallet to a second hot wallet which uses unique addresses for each transactions and randomizes the input output to "give more privacy", and stopped sending the whole amount or round numbers, and then send to cold storage. This didn't help at all. I have just downloaded Bisq and am trying to figure it out along with CoinJoins/mixers etc

TL:DR

1. Is there a source for a STEP_BY_STEP GUIDE on how to increase the privacy of coins already sent to cold storage?
2. Is there a STEP_BY_STEP GUIDE on how to keep bitcoins completely (or close to) private from the first purchase to cold storage?

A transaction with "Low Privacy"

https://blockchair.com/bitcoin/transaction/714259ec65aedfba4b6c98a214fffae16e03943241194cc9b3aba2f778d374a2

Thanks in advance.