Blowjob - spit or swallow

I’m very new to giving blowjobs, I have given my crush them a couple of times, but they have all been as a foreplay to sex..

But now that I’m on my period and I want to give him a blowjob, I thought about what do I do when he cums? Haha

Do I swallow it? Do I move my head when he cums? Do I spit it out? And if I spit, then where?

I know it’s totally up to me, and that I shouldn’t do anything I’m uncomfortable with. But I would just like to know what you guys do and hear your thoughts on it😆