I'm not a fan of sparring with guys who likely have my entire bodyweight in muscle, but the interest both of you showed makes me intrigued enough to try it at some point.

Unless the gym spars at a real high intensity, you shouldn't have an issue because people will take your size and weight into consideration. If the gym does spar at a real high intensity, especially frequently, that's a big red flag that the gym is an unsafe environment because that alone greatly increases the risk of injury. When it comes to things like learning techniques and running drills, you can easily work with people who have twenty to fifty pounds on you, because the focus shouldn't be on overcoming the person working opposite from you, but learning the body motions and the theories behind the techniques.

Case in point? One class I had a judo partner who was over a foot taller than me and had me by at least fifty pounds, if not more, and they worked with me so well and were so helpful, I didn't even notice the size difference.

No pressure though. You gotta do and worry about what feels safe and comfortable for you.