Where can I find reliable affordable book publishing companies for first-time authors?

Hi everyone, I’m trying to understand the best options for affordable book publishing companies as a first-time author. I’ve been researching different book publishing routes, but it’s confusing to know which ones are actually trustworthy and worth the cost. Some promise full services, but I’m not sure about quality vs price balance. Has anyone here worked with budget-friendly publishers or have honest suggestions on what to look for before choosing one?