Yes, you won't get the right idea about Bitcoin from a trader. The trader buys bitcoins and sells them at some profit. So if you go to a trader to get ideas about Bitcoin then he will give you ideas about trading. When you invested, if you could have held until now, you could have been in good profit now. Bitcoin will grow in popularity day by day and Bitcoin price will continue to rise in the future. Since you realized you were wrong, you continue to invest in Bitcoin again and hold long term. So you can follow DCA method, which is the best method to invest in Bitcoin.
Both do it for profit in the end.
They just stabilize risk / time differently.
It's true that at the end of the day it's all about the money, but trading is what you should avoid mostly as a newbie, because you are more likely to lose your money then making any as a trader, and it's mostly due to lack of patience and greed that mostly makes traders goes that route.
And one thing you should take note of is that trading can never change your life forever as investment in Bitcoin can do, because if you can accumulate a very good stash of Bitcoin now and hold in like 10 to 20 years time from now, by then Bitcoin would have gone up to a million dollar or more, so it is very clear that investment in Bitcoin can be used to build a generational wealth overtime unlike trading which can even reduce you financially.
The guy next door trading wasn't born with trading knowledge neither was he introduced by birth, it was pure learning with time. There is nothing bad if a newbie avoid trading but a newbie can buy Bitcoin when he has the money and hold the Bitcoin in a separate wallet and focus on trading at the same time. Holding doesn't have any challenge other than the security measure and if you put it right in place, you have nothing to worry about, just be optimistic.
If you have what it takes to be a trader, you have the means to learn, you have the time by your side and you have the passion to trade, go and learn it. You don't even need real money to trade as beginner, there are plenty of demo accounts where you can use Bitcoin to learn trading and when you are confident enough to start trading with real money, you can do that. There is nothing best like trading for stable coins and recycling it back to Bitcoin as DCA when there is dump in the market.