Never done big mistakes yet, never traded, self custofy from the very beginning...even my beginner shitcoiner period has ended well as I finally managed to sell my dirty eth at a better price against BTC than when I bought them.

The only regret I have is having decided back in 2014, to buy a Bitcoin worth 300 USD at that time (Kraken account created, fiat deposit done....), but retracting myself at the last moment cause after all it was my parents money I was gambling at that time as a student... 300 USD was what I got every month to eat and enjoy life so it was a lot to spent in something I didn't quite understand yet

So my advice if you still hesitate as a new comer to buy some/more sats, do it. Take some risks with the money you will not need in the next few years, and study Bitcoin harder to make the pain of the bear markets lighter