I'd say the golden advice. Talk to the gm. They are probably gonna help you there.

Btw

This is might pretty normal in dnd. But not necessarily every ttrpg. Iirc there's systems like blades in the dark where (correct me if I'm wrong) there's mechanics that make planning easier. And others.

And even then not every group likes planning. It's a spectrum from no planning and spending multiple sessions planning but most people are in the middle.

Back on topic talk to the gm. That's 1 of the best pieces of advice in the hobby.