Having Bitcoin is not difficult, because even if it's only 1 satoshi, you can immediately have it as long as you make a purchase, no matter how much you actually have. The only difficult thing is to immediately understand crypto trading. It is not easy to learn once you enter; it is not possible the next day.
You already know everything; trading is not designed like that in the Bitcoin industry. So, if you want to trade Bitcoin, you can do that right away; even now, you can do that, but the question is, do you have extensive knowledge of chart analysis in an exchange? Do you know how to read a trading graph? Yes, it is true that it is based on price prediction, but there is a basis using different tool indicators.
We can even get 1 Satoshi for free in a BTC faucet but the only problem is they have minimum amounts to withdraw, so yeah that the only best way to instantly have a BTC is to buy it. We must only understand that there is also a minimum when buying a BTC on some exchanges. This is due to the fee and maybe to prevent from spamming the network but who wants only 1 Satoshi anyway? Lol.
Trading is not only limited to crypto, so if we have a knowledge about it before, it might also be possible to apply it here in crypto immediately. Indeed trading is still predicting or guessing but it's more on a educated guess with the help of analysis and tools.