Thanks for coming back to us, Jordan.
A few comments come to mind, if I may:-
1) Perhaps your unqualified colleagues are in fact qualified through experience.
2) It is your boss you need to impress. Can we assume that he (she) is a veteran technician himself (I won't add
herself as I easily tire of all that stuff)?
3) It seems you have had 18 months in which to make an impression. Some us (myself for example) never had such luxury!
4) Are you paying for your HNC course? If not, again count your blessings!
Are you looking for advice? Assuming that you're happy with the idea of working in biomed in the long term, why not knuckle down and crack on with it? Those older guys will have moved on (retired) eventually, leaving you as cock of the roost!
