Depending on each person's income and circumstances, we will have different investment plans in bitcoin. So, I have no opinion on your plan because only you know what is best for you. But investing and accumulating bitcoin is not as simple as many people think, so I hope you will continue to learn every day to have a deeper look at bitcoin and have stronger faith in bitcoin. There will be many challenges waiting for you, I hope you can maintain your plan as long as possible.
I like OP's plan but you're right, it's great that we prepare a perfect plan but whether we can complete it is another matter. There is no success without trade-offs or we have to pay a high price, and reality is much harsher than we imagine. So I hope OP will maintain his monthly DCA plan with discipline and if there are any setbacks, he doesn't give up. Bitcoin is truly an asset, a potential investment, but whether it brings us profit or not is up to us to decide, bitcoin cannot decide for us.