Question about pruning plants?

I decided to go ahead an prune my begonia plant but I'm not sure how to go about doing it! It has a few single flowers on the ends of some long stems, that are the ones I want to prune, but should I cut the ones that have flowers growing on them?





The stems that I want to cut also seem really thick and I feel like I will be cutting off most of the plant and that it will have a hard time growing back. Should I just go ahead and trim what sticks out a lot?





This is my first time, and I'm really unsure what to do!


Thanks

Question about pruning plants?
You can pretty much prune them whenever they need it, they are so hearty! Take the cuttings and stick them in the dirt, you can have some extras for yourself or as pass alongs!