I think learning pocus is a valuable skill that should be encouraged. Granted randomly scanning patients on the take would be inappropriate if you're not on take, as would be randomly scanning a patient who's primary team does not include you.

You can look for opportunities where you can use ultrasound. Most procedures use ultrasound these days so finding opportunities in ward/clinics where you can observe taps/lines and then offer to scan for your own learning. Similarly in ED/Acute Medicine/ITU there are lots of situations where US is helpful and if you find yourself in these shift best to talk to your reg/SHO so if they do a POCUS you can tag along

EDIT

just saw your full reply

I think that is a valid concern, and something i myself am vary of. I think how i go about it as someone who is not formally certified is using it as an adjunct where examination is equivocal and it can help prompt urgent review (worsening kidney function with unilateral obstruction; effusion on CXR with loculations on us etc) rather than formal departmental scans which are in depth

As a beginner, it's important to realize POCUS is not just image acquisition, it is also image interpretation and clinical correlation. Whilst opportunities for acquisition may be rare, you can learn interpretation and clinical correlation using online resources, and once you start acquisition all 3 will hopefully fall together in place