It is not as hard as you are wanting to make it out to be.
Just get started.. $10 per week or whatever you can afford, and then look at the matter 10 years from now and see where you are at.
The ideal and smart moment, in my opinion, for someone to make a $10 weekly investment in bitcoin for good profits in years to come should be during a bear market when the bitcoin price is declining rather than rising at an ATH. I said this because making an investment of $10 per week would not yield the same expected profits as making an investment during a bear market.
Given the current state of the market and the high price of bitcoin, a crypto investor would need to make significant investments in the bitcoin before the bull run ends. However, not every investor is willing to take the risk of investing more than they can afford to.