I had no one and I was so determined to find my ways around and here are the costs
1. In 2017 there are many new altcoins mostly PoW coin and I was so hooked to finding the next big thing another projects that will be like BTC and ETH so I started mining every new coins I saw, as time goes by 95% of those coins end up worthless, I was just luck that few ones survived ( havven protocol, electroneum, Loki)
2. I don't know that with underclocking and overclocking can make you safe power consumption on rigs, I just insert GPU in motherboard and start mining , sadly I did this for two years
3. I never knew that some GPUs are better than the other, I went out to computer store nearby and buying whatever I could get my hands on, HD7770, HD6950, GTX 660 etc
4. I even store my coins on wallets like Free wallet which is a very bad one, never knew about centralised and decentralized wallets, I ended losing 1 million doge coin to Free wallet
If I had a teacher in 2017 maybe I would have escape some of this mistakes? but I had no one and thankful here I am today still standing strong
It's a good thing that you realize what were the mistakes you did. Not repeating the same mistakes is where many people fail.
Even I have made some mistakes and learn from it. Although we make mistakes, learning from them is a skill that everyone should develop.
Below are some mistakes that I did and I wish I knew it before I did them.
1. Investing in Ponzi scheme (Bitconnect)
2. Investing in Pump and Dump (Back in 2017, in the ICO era)
3. Trading without knowing about the coin
4. Not buying the dip (Learnt it last year, improvised by buying the dip this year)