Worries me too, it still shocks me how often people have big amounts of their Bitcoin on exchanges.

To anyone reading this:
Self custody is easy
Running a Bitcoin node is easy

Take some time on a weekend to figure out how these things work, it's your money after all 🤷‍♂️

Also, if you're really just starting out, randomly click through mempool.space to get a good feel for how Bitcoin transactions work!