Am 25 virgin and I want to swallow but nervous.

M25. Virgin. I find the thought hot af to suck and swallow. Okay so yes I have never ever done anything. All I know is that cum is salty as I've slightly tasted my own. I'm not too interested in the taste, just that sucking till someone cums is hot. I am nervous because in case I end up gagging and the worse , being sick. Any advice?