"Losing skills"....have you ever forgotten how to ride a bike, how to walk, how to whistle, how to blow a bubble? Those are skills and much like all the "skills" we learn in EMS...you will not lose them. Sure you might be wobbly on the bike, but within a few seconds you will be fine. So you might not get the first IV, but you will nail the second.
What you should be more concerned about especially as a new medic is expanding your education, your knowledge. Fortunately for you, it seems you have a lot of time to become a better clinician ever single shift. You can read professional journals/websites, take courses, review your own case, follow up on your cases and simply put become a well rounded "expert" provider. You also have time to practice the "skills" in your rig or station. Remember that skills are nothing but muscle memory for the most part, once you have that established it is hard if not impossible to ever lose that.
Examples: Setting up an IV and operating a motorcycle. I do both without thinking about it. I do not mean observing other drivers and watching for poor road conditions...I mean the shifting, the braking, the turn signals...it is all muscle memory, I do not have to think which allows me to focus on more important issues (texting drivers). Same with IV...I can darn near set up and prep an IV without giving it my full undivided attention because the muscle memory is there.
The others have covered it well, however I do realize being young, new or both to paramedicine that you are yearning for the exciting calls and want to be busy for more exposure. You have a golden opportunity in your hands yet do not have enough knowledge/experience to realize it.