Congrats on getting the research position! Clinical research is a lot different from bench research. I work in clinical research, and most of it is just databasing and statistics. Depending on if you're doing Clinical Trials or Statistical studies, your experience will vary.
At the place where I work, we have both going on. In clinical trials, you get to talk to patients, enroll them in studies, do some paperwork, and hand out drugs. For the more statistical studies, most of the time, you just get a fat stack of papers/charts/binders, and you just go through them collecting data and analyzing them -- so not much patient interaction there.
From my experience, it's generally not that stressful. It could be busy depending on what your role is in the research team. For me, it really got stressful when you have a deadline and you have a million stacks of paper/charts to go through.
My faculty wasn't around that much. The big boss just came in to check on my team once a month or so. The rest of the time, it's just me and the team. We do everything together, which is kind of nice because you really get to bond with them, haha.
Publishing will also depend on how prolific your research team is. Writing papers/abstracts and submitting them doesn't guarantee an accepted publication. I worked in clinical research for 3 years already, and I've gone through 6 different submissions of papers and abstracts for the projects I've been working on, and I've only gotten a paper accepted recently. So yes, it can be pretty challenging to publish.
In all, I think you shouldn't worry about it too much at this stage. Just go with the flow and take what you can out of the experience. Assuming you're in undergrad, the accomplishment that comes out of research isn't going to be as valuable as the experience of doing research. I would look at any publications as icing on the cake, rather than something that you absolutely must have.