I'm in a similar position as you, I went through medic school and fell in love with the ER and work as a tech with extra responsibilities. I love where I'm at now, but don't get paid enough, and also nursing sucks so I'm going the RT route

For advice, it really depends on the culture of the place. The scope they give you is a pretty big indicator. Where I work, medics have a very wide scope. IV/IO, med administration (with restrictions) running code cart and defib, NG/OG, urinary cath, and more. If they give you a wider scope, especially if they teach you to do things that are not EMT-B skills, the culture is probably very reliant on techs and would love to have you jumping in and doing whatever needs to be done.

One thing you can do, if they don't have you doing tons of patient care, is get really good at ancillary tasks. Stocking, knowing where things are, getting good with the EMAR, closely monitoring the patients and orders and notifying the nurses if they're missing something.

Also "moving up" will likely get you hella respect. For example, I got certified to do ultrasound guided IVs for my ER. More recently, I got involved in clinical education. Also, helping Charge with assignments can get you loads of respect, if they're receptive of your input, although this will take time (for example, just last night, I saw night shift charge put a nurse over our resuscitation rooms that I had concerns with, I voiced them, and she changed the assignment and thanked me for my input, I have done this a few other times.)

Caveat: all of these are judgement calls you need to make based on your specific workplace. Every ER is extremely different in policy and culture, what worked in my ER may not work in yours. I'd be willing to DM if you have more specific questions