Courses to pursue during holidays

Sure . Pursue anything that takes your fancy . It doesn't matter what , as long as you're interested in the topic and having fun while at it .

like the dark side

Frankly, If you have no experience maching or forging, I'd go hang around a machine shop or forge shop.

Not all learning comes from coursework. the best lessons come from seeing trying, failing, and improving on the next try.

Biomedical devices will have machined or forged components in some way either themselves or in the tolling to make them.

get some dirt under thy nails!

You'll be all the better for it.

milo