Some of you ideas are good but DCA is smart plan. I think It's hard to time the market. It's more complex.
My personal opinion is learn first. Without learning, anyone may lose money so learn first then think about trade.
And If you want to hold bitcoin, I believe use DCA is a smart choice but spend all the money at once is risky.
Market don't move in the straight line so Watch the market will be wise. No one can't guess future prices by looking at past ones.
I feel like you're getting a little lost in this because after all, the DCA method that is being done is more of an investment rather than trading so for now why would you think about trading if you eventually want to try to do DCA as a buying method because it's clearly two different things.
Also in this case I would like to suggest especially when talking about beginners (although I don't know if you are a beginner or not) but definitely for beginners it is not recommended to trade because obviously it will only destroy yourself, your trust in bitcoin and spend your own money.
So focus on investing because indeed this could be a wiser move to make. Don't just get hung up on the short and big profits offered by some trading influencers or who always show off the results of trades made on social media but try good investment steps so that you at least know that investing in bitcoin is much more worth it than trading.