Once you finished your PhD, you probably want to jump directly into lectureship. But this comes with some pros and cons.

Pros: You earn better, most lecturers position are permanent staff basis. Which means you probably entitled to better perks such as bonuses, medical and allowances. While Postdoc probably comes in contract term where you may lose out on the perks as stated.

Cons: Responsibility wise, you are required to conduct lecture class, tutorial, setting of question papers + marking, assignments + marking which can be very tedious can time consuming which lower your time for research. Postdoc on the other hand does not need to do so and just focus on research projects. Which can lead to better quality paper publishing in building profile internationally. Nevertheless, you can still be a lecturer and do good research, probably with lesser time for yourself.