I believe you can’t gain seniority during peak season meaning you can’t be apart of the union and are not considered truly permanent as a driver.
You need to complete your 30 day probationary period before it is set in stone.
For all you know they put up full time position listing to trick people into seasonal jobs they plan on disqualifying you from as soon as January rolls around. Texas is blowing up right now, so maybe not the case.
At your level the best move for meeting coworkers is the safety committee folks and your union steward. Just be inquisitive and find mentors talking to people eventually leads to talking to other people in similar mind states or situations and bonding. As you build knowledge about the job and a good reputation as a personable person others will seek you out for advice or to shoot the
for the 5-10 minutes we actually see each other per day. For the most part it is a solitary job, you won’t know everyone and be in everyone’s business.