The phrase "begin by considering" is correct and usable in written English.
You can use it when you want to advise somebody to think carefully about a particular thing before taking further action. For example, "If you want to find a good job, begin by considering what type of work you find the most interesting."
We begin by considering a single one-dimensional periodic array of pins.
We begin by considering Mesoamerican societies at the time of the Spanish invasion.
We begin by considering the use of crowdfunding and the characteristics of typical crowdfunding contracts.
We can begin by considering ribozymes, which are strands of RNA with catalytic sites resembling those of enzymes.
We begin by considering a Lagrangian together with a configuration space with unilateral constraints on the set of admissible configurations.
Prior to embarking upon the purification of a protein, one should begin by considering what the protein is to be used for.
To separate hope from reality, it is necessary to begin by considering the promise that P2P lending seemed to embody when it first emerged.
We begin by considering the "public service" responsibilities of the press -- to inform and engage citizens -- and the various policy regimes for implementing these responsibilities.
MONOPOLIZATION... We begin by considering whether Microsoft possesses monopoly power, and finding that it does, we turn to the question whether it maintained this power through anticompetitive means.
They should begin by considering the two possible models for ensuring stability and debt sustainability in a monetary union: the mutualization model and the liability model.
Such an assessment must begin by considering the consequences of lifting the majority of sanctions on Iran — and of Iran resuming normal trade with the world's major economies.
