I think NAT Z post says it all. I have been in exactly the same position, albeit in the UK. (lowcost-to Long haul)
I was given some advice when I was thinking what to do……."you’ll regret it if you stay (all you will want is a stable, secure job with good quality of life) and you’ll regret if you go elsewhere (you will see you friends get commands and the extra money/stripe whatever turns you on)."
The above was very true for me until about 18 months into my current job, and then I started to see what a wonderful quality of life I had. I have no regrets at all. Get into the big seniority based airline asap.
The only word of caution would be if you ever want to work in the USA. They put a lot of emphasis on P1 time, whether it was from a Cessna or a 737 doesn’t seem to matter, even for F/o jobs.